In radio-communication, the signals emitted by transmitting antenna are reflected on – (1) stratosphere (2) ozonosphere (3) ionosphere (4) troposphere

In radio-communication, the signals emitted by transmitting antenna are reflected on – (1) stratosphere (2) ozonosphere (3) ionosphere (4) troposphere
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(3) ionosphere Explanation: The lower atmosphere is more or less transparent to radio waves. However, the ionosphere reflects back the radio waves. Thus, a signal emitted by an antenna from a certain place can be received at another place on the surface of Earth in the following two ways: ground wave propagation and sky wave propagation.
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In radio-communication, the signals emitted by transmitting antenna are reflected on (1) stratosphere(2) ozonosphere (3) ionosphere (4) troposphere

Description : In radio-communication, the signals emitted by transmitting antenna are reflected on (1) stratosphere(2) ozonosphere (3) ionosphere (4) troposphere

Last Answer : ionosphere

In Radio Communication, the signals emitted by transmitting antenna are reflected on

Description : In Radio Communication, the signals emitted by transmitting antenna are reflected on

Last Answer : Ionosphere

The atmospheric layer reflecting radio waves is called – (1) Ozonosphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : The atmospheric layer reflecting radio waves is called – (1) Ozonosphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Last Answer : (2) Ionosphere Explanation: The ionosphere is a part of the upper atmosphere, from about 85 km to 600 km altitude, comprising portions of the mesosphere, thermosphere and exosphere, ... importance because, among other functions, it influences radio propagation to distant places on the Earth.

The atmospheric layer reflecting radio waves is called (1) Ozonosphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : The atmospheric layer reflecting radio waves is called (1) Ozonosphere (2) Ionosphere (3) Stratosphere (4) Mesosphere 

Last Answer : Ionosphere

The layer of the atmosphere in which Radio Waves are reflected back is called- (1) Ionosphere (2) Troposphere (3) Stratosphere (4) Exosphere

Description : The layer of the atmosphere in which Radio Waves are reflected back is called- (1) Ionosphere (2) Troposphere (3) Stratosphere (4) Exosphere

Last Answer : (1) Ionosphere Explanation: The Radio waves are reflected back to Earth in the Ionosphere which is an electrically charged layer of the upper atmosphere. This process is used to communicate beyond the horizon, atintercontinental distances, mostly in the shortwave frequency bands.

The layer of the atmosphere in which Radio Waves are reflected back is called ; (1) Ionosphere (2) Troposphere (3) Stratosphere(4) Exosphere

Description : The layer of the atmosphere in which Radio Waves are reflected back is called ; (1) Ionosphere (2) Troposphere (3) Stratosphere(4) Exosphere

Last Answer : Ionosphere

Pick out the wrong statement (A) The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone (B) Mesosphere is characterised by very low atmospheric pressure and low temperature (C) Troposphere is a dusty zone containing water vapor and clouds (D) The radio waves used in the long distance radio communication are reflected back to earth by stratosphere

Description : Pick out the wrong statement (A) The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone (B) Mesosphere is characterised by very low atmospheric ... radio waves used in the long distance radio communication are reflected back to earth by stratosphere

Last Answer : (D) The radio waves used in the long distance radio communication are reflected back to earth by stratosphere

The layer of atmosphere used for radio-wave transmission is (1) chromosphere (2) troposphere (3) ionosphere (4) stratosphere

Description : The layer of atmosphere used for radio-wave transmission is (1) chromosphere (2) troposphere (3) ionosphere (4) stratosphere

Last Answer : ionosphere

You are flying between Chicago and San Francisco on a commercial jet. The pilot comes on the public address system and announces that the plane's cruising altitude is 40,000 feet. At this altitude are you in the: w) troposphere x) stratosphere y) ozonosphere z) chemosphere

Description : You are flying between Chicago and San Francisco on a commercial jet. The pilot comes on the public address system and announces that the plane's cruising altitude is 40,000 feet. At this altitude are you in the: w) troposphere x) stratosphere y) ozonosphere z) chemosphere

Last Answer : ANSWER: X -- STRATOSPHERE

Which of the following layers make radio transmission possible? A. Troposphere B. Ionosphere (Answer) C. Mesosphere D. Stratosphere E. None of these

Description : Which of the following layers make radio transmission possible? A. Troposphere B. Ionosphere (Answer) C. Mesosphere D. Stratosphere E. None of these

Last Answer : B. Ionosphere (Answer)

Match List I (Layers of Atmosphere) and List II (Characteristics) and select the correct answer using the code given below. L ist I L i st I I (L ayer of (Char acter ist ics) At mospher e) A. Ionosphere I. Contains Ozone B. Stratosphere II. Reflects radio Waves C. Exosphere III. Fall in Temperature D. Troposphere IV. Extremely low air density (1) A-II, B-III, C-IV, D-I (2) A-II, B-I, C-IV, D-III (3) A-II, B-III, C-I, D-IV (4) A-III, B-I, C-IV, D-II

Description : Match List I (Layers of Atmosphere) and List II (Characteristics) and select the correct answer using the code given below. L ist I L i st I I (L ayer of (Char acter ist ics) At mospher e) A. Ionosphere I. Contains Ozone B. ... D-III (3) A-II, B-III, C-I, D-IV (4) A-III, B-I, C-IV, D-II

Last Answer : 2) A-II, B-I, C-IV, D-III

The layer of atmosphere used for radiowave transmission is – (1) chromosphere (2) troposphere (3) ionosphere (4) stratosphere

Description : The layer of atmosphere used for radiowave transmission is – (1) chromosphere (2) troposphere (3) ionosphere (4) stratosphere

Last Answer : (3) ionosphere Explanation: The ionosphere is a part of the upper atmosphere and is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner ... importance because, among other functions, it influences radio propagation to distant places on the Earth.

Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Most of the ozone in the atmosphere is concentrated in the _____ A. Mesosphere B. Troposphere C. Stratosphere D. Ionosphere

Description : Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Most of the ozone in the atmosphere is concentrated in the _____ A. Mesosphere B. Troposphere C. Stratosphere D. Ionosphere

Last Answer : ANSWER: C

Choose the correct option which represents the arrangement of atmospheric layers. (1) Ionosphere, Ecosphere, Mesosphere, Stratosphere, Troposphere (2) Ecosphere, Troposphere, Ionosphere, Mesosphere, Stratosphere (3) Mesosphere, Ionosphere. Eco-sphere, Troposphere, Stratosphare (4) Troposphare, Ionosphere, Ecosphere

Description : Choose the correct option which represents the arrangement of atmospheric layers. (1) Ionosphere, Ecosphere, Mesosphere, Stratosphere, Troposphere (2) Ecosphere, Troposphere, Ionosphere, ... Mesosphere, Ionosphere. Eco-sphere, Troposphere, Stratosphare (4) Troposphare, Ionosphere, Ecosphere

Last Answer : (4) Troposphare, Ionosphere, Ecosphere Explanation: From top to bottom, the Earth's atmosphere is divided into five main layers, the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. ... km Mesosphere: 50 to 80 km Stratosphere: 12 to 50 km Troposphere: 0 to 12 km

Where does most of the weather phenomena take place? (1) Ionosphere (2) Troposphere (3) Stratosphere (4) (4)Tropopause

Description : Where does most of the weather phenomena take place? (1) Ionosphere (2) Troposphere (3) Stratosphere (4) (4)Tropopause

Last Answer : (2) Troposphere Explanation: Weather is the state of the atmosphere, to the degree that it is hot or cold, wet or dry, calm or stormy, clear or cloudy. Most weather phenomena ... precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of Lime.

Which layer of the earth's atmosphere contains the ozone layer? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Description : Which layer of the earth's atmosphere contains the ozone layer? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Last Answer : (4) Stratosphere Explanation: The ozone layer is a region of Earth's stratosphere. It is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometres (12 to 19 mi) ... nm to 315 nm wavelength), which other-wise would be harmful to exposed life forms on the earth.

Daily weather changes in the atmosphere are associated with – (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Description : Daily weather changes in the atmosphere are associated with – (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Last Answer : (1) Troposphere Explanation: The lowest layer of the atmosphere, 6 miles (10 km) high in some areas and as much as 12 miles (20 km) high in others, within which ... temperature with increasing altitude and within which nearly all cloud formations occur and weather conditions manifest themselves.

A level of atmosphere which is composed partly of electrons and positive ions is called – (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : A level of atmosphere which is composed partly of electrons and positive ions is called – (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Last Answer : (2) Ionosphere Explanation: Ionosphere is composed partly of electrons and positive ions. It is a region of Earth's upper atmosphere, from about 60 km to 1,000 km altitude, that is ionized by solar radiation. This layer is also called thermosphere as its temperature rises with height.

The temperature increases rapidly above – (1) Ionosphere (2) Exosphere (3) Stratosphere (4) Troposphere

Description : The temperature increases rapidly above – (1) Ionosphere (2) Exosphere (3) Stratosphere (4) Troposphere

Last Answer : (2) Exosphere Explanation: Above Troposphere, temperature increases rapidly with height in the Stratosphere layer as it houses the ozone layer which absorbs ultraviolet (UV) rays from the sun. Again ... Exosphere which is the uppermost layer of the atmosphere reaches up to more than 4500° Celsius.

Density of the earth's atmosphere is highest in the – (1) Troposphere (2) Stratosphere (3) Mesosphere (4) Ionosphere

Description : Density of the earth's atmosphere is highest in the – (1) Troposphere (2) Stratosphere (3) Mesosphere (4) Ionosphere

Last Answer : (1) Troposphere Explanation: Over 99% of the mass of the earth's atmosphere is contained in two layers: the troposphere and the stratosphere. Most of the earth's atmosphere (80 to 90%) is found in the ... . This layer, where the earth's weather occurs, is within about 12 km of the earth's surface.

All vital atmospheric processes leading to various climatic and weather conditions take place in the : (1) Stratosphere (2) Troposphere (3) Ionosphere (4) Exosphere

Description : All vital atmospheric processes leading to various climatic and weather conditions take place in the : (1) Stratosphere (2) Troposphere (3) Ionosphere (4) Exosphere

Last Answer : (2) Troposphere Explanation: Troposphere, that extends up to a height of 12 km on an average from the surface of the earth, is the locale of all the vital atmospheric processes which ... comprising the entire atmosphere is concentrated in this zone. This is the lowermost layer of the atmosphere.

The layer of atmosphere close to the earth's surface is called – (1) Exosphere (2) Troposphere (3) Stratosphere (4) Ionosphere

Description : The layer of atmosphere close to the earth's surface is called – (1) Exosphere (2) Troposphere (3) Stratosphere (4) Ionosphere

Last Answer : (2) Troposphere Explanation: The troposphere is the lowest layer of Earth's atmosphere and site of all weather on Earth. It is bonded on the top by a layer of air called the Tropopause, which separates the troposphere from the stratosphere and on bottom by the surface of the Earth.

The layer where the decrease in temperature with increasing altitude is totally absent is – (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : The layer where the decrease in temperature with increasing altitude is totally absent is – (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Last Answer : (3) Stratosphere Explanation: The stratosphere defines a layer in which temperatures rises with increasing altitude. At the top of the stratosphere the thin air may attain temperatures close to ... . Consequently, the stratosphere is almost completely free of clouds or other forms of weather.

Ozone layer is present in - (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Exosphere

Description : Ozone layer is present in - (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Exosphere

Last Answer : (3) Stratosphere Explanation: The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres above Earth, though the thickness varies seasonally and ... in general thicker during the spring and thinner during the autumn in the northern hemisphere.

Most of the ozone in the atmosphere is concentrated in the------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. Ionosphere

Description : Most of the ozone in the atmosphere is concentrated in the------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. Ionosphere

Last Answer : C. Stratosphere (Answer)

The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name? A. Ionosphere B. Troposphere (Answer) C. Stratosphere D. Mesosphere

Description : The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name? A. Ionosphere B. Troposphere (Answer) C. Stratosphere D. Mesosphere

Last Answer : B. Troposphere (Answer)

Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth’s surface? A. Ionosphere, Mesosphere, Stratosphere, Troposphere B. Mesosphere, Stratosphere, Ionosphere, Troposphere C. Troposphere, Stratosphere, Mesosphere, Ionosphere (Answer) D. Troposphere, Ionosphere, Stratosphere, Mesosphere

Description : Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth's surface? A. Ionosphere, Mesosphere, Stratosphere, Troposphere B. ... . Troposphere, Stratosphere, Mesosphere, Ionosphere (Answer) D. Troposphere, Ionosphere, Stratosphere, Mesosphere

Last Answer : C. Troposphere, Stratosphere, Mesosphere, Ionosphere (Answer)

Most of the ozone in the atmosphere is concentrated in the -------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. ionosphere

Description : Most of the ozone in the atmosphere is concentrated in the -------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. ionosphere

Last Answer : C. Stratosphere (Answer)

The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from------ ? A. Ionosphere (Answer) B. Troposphere C. Mesosphere D. Stratosphere E. None of these

Description : The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from------ ? A. Ionosphere (Answer) B. Troposphere C. Mesosphere D. Stratosphere E. None of these

Last Answer : A. Ionosphere (Answer)

The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the (A) Ionosphere (B) Troposphere (C) Stratosphere (D) None of these

Description : The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the (A) Ionosphere (B) Troposphere (C) Stratosphere (D) None of these

Last Answer : (B) Troposphere

The lowest layer of atmosphere is known as the (A) Stratosphere (B) Troposphere (C) Ionosphere (D) None of these

Description : The lowest layer of atmosphere is known as the (A) Stratosphere (B) Troposphere (C) Ionosphere (D) None of these

Last Answer : (B) Troposphere

The upper layer of atmosphere is called the (A) Stratosphere (B) Troposphere (C) Ionosphere (D) None of these

Description : The upper layer of atmosphere is called the (A) Stratosphere (B) Troposphere (C) Ionosphere (D) None of these

Last Answer : (A) Stratosphere

The main atmospheric layer near the surface of earth is a) Troposphere b) Mesosphere c) Ionosphere d) Stratosphere

Description : The main atmospheric layer near the surface of earth is a) Troposphere b) Mesosphere c) Ionosphere d) Stratosphere

Last Answer : a) Troposphere

The jet-stream lies between which two layers of th earth's atmosphere? w) thermosphere and ionosphere x) mesosphere and thermosphere y) troposphere and stratosphere z) stratosphere and mesosphere

Description : The jet-stream lies between which two layers of th earth's atmosphere? w) thermosphere and ionosphere x) mesosphere and thermosphere y) troposphere and stratosphere z) stratosphere and mesosphere

Last Answer : ANSWER: Y -- TROPOSPHERE AND STRATOSPHERE

Ozone layer is present in (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Exosphere

Description : Ozone layer is present in (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Exosphere 

Last Answer : Stratosphere

The layer where the decrease in temperature with increasing altitude is totally absent is (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : The layer where the decrease in temperature with increasing altitude is totally absent is (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Last Answer : Stratosphere

Which layer of the earth’s atmosphere contains the ozone layer ? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Description : Which layer of the earth’s atmosphere contains the ozone layer ? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Last Answer : Stratosphere

A level of atmosphere which is composed partly of electrons and positive ions is called (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Description : A level of atmosphere which is composed partly of electrons and positive ions is called (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere

Last Answer : Ionosphere

All vital atmospheric processes leading to various climatic and weather conditions take place in the : (1) Stratosphere (2) Troposphere (3) Ionosphere (4) Exosphere

Description : All vital atmospheric processes leading to various climatic and weather conditions take place in the : (1) Stratosphere (2) Troposphere (3) Ionosphere (4) Exosphere

Last Answer : Troposphere

Choose the correct option which represents the arrangement of atmospheric layers. (1) Ionosphere, Ecosphere, Mesosphere, Stratosphere, Troposphere (2) Ecosphere, Troposphere, Ionosphere, Mesosphere, Stratosphere (3) Mesosphere, Ionosphere. Ecosphere, Troposphere, Stratosphare (4) Troposphare, Ionosphere, Ecosphere

Description : Choose the correct option which represents the arrangement of atmospheric layers. (1) Ionosphere, Ecosphere, Mesosphere, Stratosphere, Troposphere (2) Ecosphere, Troposphere, Ionosphere, ... ) Mesosphere, Ionosphere. Ecosphere, Troposphere, Stratosphare (4) Troposphare, Ionosphere, Ecosphere

Last Answer : Troposphare, Ionosphere, Ecosphere

The layer of atmosphere close to the earth’s surface is called (1) Exosphere (2) Troposphere (3) Stratosphere (4) Ionosphere

Description : The layer of atmosphere close to the earth’s surface is called (1) Exosphere (2) Troposphere (3) Stratosphere (4) Ionosphere

Last Answer : Troposphere

Density of the earth’s atmosphere is highest in the (1) Troposphere (2) Stratosphere (3) Mesosphere (4) Ionosphere

Description : Density of the earth’s atmosphere is highest in the (1) Troposphere (2) Stratosphere (3) Mesosphere (4) Ionosphere

Last Answer : Troposphere

Daily weather changes in the atmosphere are associated with (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Description : Daily weather changes in the atmosphere are associated with (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Last Answer : Troposphere

Where does most of the weather phenomena take place? (1) Ionosphere (2)Troposphere (3) Stratosphere (4)Tropopause

Description : Where does most of the weather phenomena take place? (1) Ionosphere (2)Troposphere (3) Stratosphere (4)Tropopause

Last Answer : Troposphere

Which layer of the earth’s atmosphere reflects back the radio waves to the earth’s surface? (1) Ionosphere (2) Stratosphere (3) Mesosphere (4) Exosphere

Description : Which layer of the earth’s atmosphere reflects back the radio waves to the earth’s surface? (1) Ionosphere (2) Stratosphere (3) Mesosphere (4) Exosphere

Last Answer : (1) Ionosphere Explanation: Long distance propagation of radio waves depends on an invisible layer of charged particles, which envelops the Earth. This layer of charged particles known as the ionosphere ... communication during the early part of the twentieth century, the ionosphere came as a boon.

Which layer of the earth’s atmosphere reflect back the radio waves to the earth’s surface ? (1) ionosphere (2) stratosphere (3) mesosphere (4) exosphere

Description : Which layer of the earth’s atmosphere reflect back the radio waves to the earth’s surface ? (1) ionosphere (2) stratosphere (3) mesosphere (4) exosphere 

Last Answer : ionosphere

What is a selective fading effect? A. A fading effect caused by small changes in beam heading at the receiving station. B. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station. C. A fading effect caused by large changes in the height of the ionosphere, as experienced at the receiving station D. A fading effect caused by time differences between the receiving and transmitting stations.

Description : What is a selective fading effect? A. A fading effect caused by small changes in beam heading at the receiving station. B. A fading effect caused by phase differences between radio wave ... station D. A fading effect caused by time differences between the receiving and transmitting stations.

Last Answer : B. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station.

What is the major cause of selective fading? A. Small changes in the beam heading at the receiving station. B. Large changes in the height of the ionosphere, as experience at the receiving station. C. Time differences between the receiving and transmitting stations. D. Phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Description : What is the major cause of selective fading? A. Small changes in the beam heading at the receiving station. B. Large changes in the height of the ionosphere, as experience at the ... Phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Last Answer : D. Phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Refers to an effect of selective fading. A. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station. B. A fading effect caused by small changes in beam heading at the receiving station. C. A fading effect caused by the time differences between the receiving and transmitting stations. D. A fading effect caused by large changes in the height of the ionosphere, as experienced at the receiving station.

Description : Refers to an effect of selective fading. A. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station. B. A fading ... caused by large changes in the height of the ionosphere, as experienced at the receiving station.

Last Answer : A. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station.

Sum of all ecosystems is classified as------? A. Aero sphere B. Ionosphere C. Biosphere (Answer) D. Ozonosphere

Description : Sum of all ecosystems is classified as------? A. Aero sphere B. Ionosphere C. Biosphere (Answer) D. Ozonosphere

Last Answer : C. Biosphere (Answer)