Description : Ozone layer above the surface of Earth provides a shield against (1) X-rays (2) Ultra-violet rays (3) Gamma rays (4) Infra-red rays
Last Answer : Ultra-violet rays
Description : Night photography and photopraphy in mist and fog are possible using – (1) ultra-violet radiation (2) infra-red radiation (3) microwave radiation (4) gamma radiation
Last Answer : (2) infra-red radiation Explanation: Infrared is used in night vision equipment when there is insufficient visible light to see. Night vision devices operate through a process involving the ... then amplified by a chemical and electrical process and then converted back into visible light.
Description : Night photography and photopraphy in mist and fog are possible using (1) ultra-violet radiation (2) infra-red radiation (3) microwave radiation (4) gamma radiation
Last Answer : infra-red radiation
Description : In a filament type light bulb most of the electric power consumed appears as – (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light
Last Answer : (2) infra-red rays Explanation: When electricity is passed through the filament, the filament gets hot. Depending on the temperature of the filament, radiation is emitted from the filament. The ... energy converts into visible light and rest of it is emitted as heat or infrared radiation.
Description : Which of the following parts of the sunlight makes the solar cooker hot? (1) Ultra violet (2) Red light (3) Infra red (4) Cosmic rays
Last Answer : (3) Infra red Explanation: Glass transmits visible light but blocks infrared thermal radiation from escaping. This amplifies the heat trapping effect. A solar cooker, or solar oven, is a device which ... The vast majority of the solar cookers presently in use are relatively cheap, low-tech devices.
Description : In a filament type light bulb most of the electric power consumed appears as (1) visible light (2) infra-red rays (3) ultra-violet rays (4) fluorescent light
Last Answer : infra-red rays
Description : Which of the following parts of the sunlight makes the solar cooker hot ? (1) Ultra violet (2) Red light (3) Infra red (4) Cosmic rays
Last Answer : Infra red
Description : The ozone layer protects us from - (1) Ultra violet rays (2) Radio waves (3) Visual radiation (4) Infrared radiation
Last Answer : (1) Ultra violet rays Explanation: The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects.
Description : (3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ... the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).
Last Answer : The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water
Description : Ozone saves the biosphere by absorbing high energy radiations called - (1) Infra-red (2) Gamma rays (3) Ultraviolet rays (UV) (4) X-rays
Last Answer : (3) Ultraviolet rays (UV) Explanation: The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It absorbs 97 to 99 ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
Description : Ozone saves the biosphere by absorbing high energy radiations called _____ . (1) Infra-red (IR) (2) Gamma rays (3) Ultraviolet rays (UV) (4) X–rays
Last Answer : Ultraviolet rays (UV)
Description : Of the following, the most energetic form of NON-IONIZING radiation is: w) ultra-violet light x) infra-red light y) radar z) microwaves
Last Answer : ANSWER: W -- ULTRA-VIOLET LIGHT
Description : Which of the following has the lowest frequency? (1) Visible light (2) Gamma rays (3) Xrays (4) Ultra violet rays
Last Answer : (1) Visible light Explanation: The common material used as fuse wire is an alloy of tin and lead (63% tin and 37% lead). Fuse wires provide over current protection of an electrical circuit ... or strip that melts when too much current flows through it, thereby interrupting the flow of current.
Last Answer : Visible light
Description : The Ozone layer protects us from: (1) Cosmic rays (2) Ultra-Violet rays (3) Visible rays (4) Infrared rays
Last Answer : (2) Ultra-Violet rays Explanation: The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97- 99% of the Sun's ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
Last Answer : Ultra-Violet rays
Description : X-rays region lies between – (1) Ultraviolet and visible region (2) Visible and infra-red region (3) Gamma-rays and ultraviolet region (4) Short radio waves and long radio waves
Last Answer : (3) Gamma-rays and ultraviolet region Explanation: X-rays region lies between Gamma rays and ultra-violet region.
Description : Energy of Ultraviolet rays is great than (1) Infra-red rays (2) Gamma rays (3) X-rays (4) Cosmic rays
Last Answer : (1) Infra-red rays Explanation: The electromagnetic spectrum is the name we use when we talk about different types of radiation as a group. The parts of the electromagnetic spectmm, arranged from highest energy ... mass that move in a wave pattern, all at the same speed - the speed of light.
Description : Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as ______. (1) light waves (2) electromagnetic waves (3) electric waves (4) magnetic waves
Last Answer : (2) electromagnetic waves Explanation: Electromagnetic radiation is the radiant energy released by certain electromagnetic processes. It consists of electromagnetic waves which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum.
Description : X-rays region lies between (1) Ultraviolet and visible region (2) Visible and infra-red region (3) Gamma-rays and ultraviolet region (4) Short radio waves and long radio waves
Last Answer : Gamma-rays and ultraviolet region
Description : Energy of Ultraviolet rays is great than (1) Infra–red rays (2) Gamma rays (3) X–rays (4) Cosmic rays
Last Answer : Infra–red rays
Description : Which of the following has the highest energy? A. gamma rays (Answer) B. X-rays C. Ultra-violet radiation D. radio waves
Last Answer : A. gamma rays (Answer)
Description : Ozone layer prevents ------- radiation from entering the atmosphere? A. Infra-red B. Ultraviolet (Answer) C. X-rays
Last Answer : B. Ultraviolet (Answer)
Description : The presence of ozone in the stratosphere is responsible for (1) increasing the average global temperature in recent years (2) higher rate of photosynthesis (3) checking the penetration of ultra-violet rays to the earth (4) supplying oxygen for people travelling in jets
Last Answer : checking the penetration of ultra-violet rays to the earth
Description : Forged documents are detected by – (1) ultraviolet rays (2) infra-red rays (3) beta rays (4) gamma rays
Last Answer : (1) ultraviolet rays Explanation: Old postcards, books, signs, photos and other paper products made before the late 1930s rarely glow under a black light. Chemical bleaches and dyes used ... light. Knowing this helps to detect forged documents and distinguish reproductions in all types of ephemera.
Description : Forged documents are detected by (1) ultraviolet rays (2) infra-red rays (3) beta rays (4) gamma rays
Last Answer : ultraviolet rays
Description : Ultra violet light of Sun's radiation is prevented from reaching the earth's atmosphere by the layer of – (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium
Last Answer : (3) Ozone Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03). The layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.
Description : Ultra violet light of Sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium
Last Answer : Ozone
Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: w) ir x) ultra-violet y) rf z) gamma ray
Last Answer : ANSWER: X -- ULTRA-VIOLET
Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3
Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Description : Ozone is (A) A primary pollutant (B) A secondary pollutant (C) Impervious to ultra-violet rays (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays. (A) X (B) α and β (C) Neutrons & gamma (D) Infrared
Last Answer : (C) Neutrons & gamma
Description : Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by – (1) Carbon dioxide (2) Ammonia (3) Chlorine (4) Ozone
Last Answer : (4) Ozone Explanation: The ozone layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth. Ozone ... Earth's atmosphere. In total, ozone makes up only 0.6 parts per million of the atmosphere.
Description : Ultra violet radiations of the Sun do not reach the earth because, earth’s atmosphere is surrounded by (1) Carbon dioxide (2) Ammonia (3) Chlorine (4) Ozone
Description : Biological shield in a nuclear reactor is generally provided to protect against the (A) α-rays (B) β-rays (C) Gamma rays & neutrons (D) Electrons
Last Answer : Option C
Description : The light rays used for eliminating bacteria – (1) X-rays (2) infrared rays (3) microwave radiation (4) ultra-violet radiation
Last Answer : (4) ultra-violet radiation Explanation: Ultraviolet radiation is used to kill microorganisms, molds and fungus in various environmental applications. UV sterilization is used for air- ... water purification, aquarium and pond maintenance, laboratory hygiene and food and beverage protection.
Description : The light rays used for eliminating bacteria (1) X-rays (2) infrared rays (3) microwave radiation (4) ultra-violet radiation
Last Answer : ultra-violet radiation
Description : Night vision is possible with the help of ------? A. Red light B. Violet light C. Infrared Rays (Answer) D. Ultra violet Light E. None of these
Last Answer : C. Infrared Rays (Answer)
Description : Pick out the wrong statement pertaining to 'green house' for the plants. (A) 'Green house' (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) ... ' thereby warming up the earth's surface (D) 'Green house' is colder than the outside atmosphere
Last Answer : (D) 'Green house' is colder than the outside atmosphere
Description : The ultra violet radiations of the Sun do not reach the Earth because the upper layers of the atmosphere contain (a) oxygen (b) helium (c) ozone (d) hydrogen
Last Answer : Ans:(c)
Description : Consider the following statements: 1. The atmosphere of the primitive earth was reducing 2. The primary source of energy for the chemosynthetic reactions on earth that led to the origin of life was the solar energy 3. Liquid water did not ... 1 and 2 (b) 1 and 4 (c) 1, 2, and 3 (d) 1, 3, and 4
Last Answer : Ans:(d)
Description : The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called: A. I r B. ultra-violet C. r f D. gamma ray
Last Answer : B. ultra-violet
Description : Green house effect is the heating up of the Earth's atmosphere which is due to – (1) the ultraviolet rays (2) y-rays (3) the infra-red rays (4) X-rays
Last Answer : (3) the infra-red rays Explanation: The greenhouse effect refers to circumstances where the short wavelengths of visible light from the sun pass through a transparent medium and are absorbed, ... The trapping of the long wavelength radiation leads to more heating and a higher resultant temperature.
Description : Green house effect is the heating up of the Earth’s atmosphere which is due to (1) the ultraviolet rays (2) g-rays (3) the infra-red rays (4) X-rays
Last Answer : the infra-red rays
Description : Which of the following is the most harmful for the human being? (A) β-rays (B) X-rays (C) γ-rays (D) Ultra violet rays
Last Answer : (C) γ-rays
Description : Growth of the baby in the uterus is found using - (1) X-rays (2) Gamma rays (3) Ultra sound (4) Ultraviolet rays
Last Answer : (3) Ultra sound Explanation: Ultrasound is a technique that uses sound waves to show a picture of a baby (fetus) in the uterus. It works by bouncing sound waves off the developing fetus. Echoes ... moving or still picture, called 43$ a sonogram, on a screen. The technique is also called sonography.
Description : Growth of the baby in the uterus is found using (1) X-rays (2) Gamma rays (3) Ultra sound (4) Ultraviolet rays
Last Answer : Ultra sound
Description : Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful (1) solar ultraviolet radiation (2) solar infrared radiation (3) CO2 in the air (4) SO2 in the air
Last Answer : (1) solar ultraviolet radiation Explanation: Ozone layer serves as a protective shield against harmful solar ultraviolet radiation.
Last Answer : solar ultraviolet radiation