The reddish hue of the Sun at sunset is due to the fact that (a) Sunlight is polarized horizontally when scattered by molecules of the atmosphere (b) Light of short wavelength is scattered more effectively by the atmosphere than light of long wavelength (c) Light of short wavelength is scattered less effectively than light of long wavelength (d) Sunlight is polarized vertically when scattered by molecules of the atmosphere

1 Answer

Answer :

Ans:(b)

Related questions

Description : ______ is a device that detects both vertically and horizontally polarized signals simultaneously. A. Crystal B. Orthomode transducer C. Light transducer D. Optoisolator

Last Answer : B. Orthomode transducer

Description : When antennas are closed to the ground, _______ polarization is ideal A. horizontally polarized B. vertically polarized C. circularly polarized D. both A and B

Last Answer : B. vertically polarized

Description : The antenna radiates _____ polarized waves when the transmitter antenna is horizontally installed. A. Vertically B. negatively C. horizontally D. circularly

Last Answer : C. horizontally

Description : A horizontal antenna is _____. A. vertically polarized B. horizontally polarized C. centrally polarized D. circularly polarized

Last Answer : B. horizontally polarized

Description : What is a device that detects both vertically and horizontally polarized signals simultaneously? A. Orthomode transducer B. Crystal detector C. Optoisolator D. Isomode detector

Last Answer : A. Orthomode transducer

Description : An electromagnetic wave is ________ polarized when the electric field lies wholly in one plane containing the direction of propagation. A. Horizontally B. Linearly C. Circularly D. Vertically

Last Answer : B. Linearly

Description : A horizontal antenna is A. centrally polarized B. vertically polarized C. horizontally polarized D. perpendicularly polarized

Last Answer : C. horizontally polarized

Description : Assertion : Rainbow is an example of the dispersion of sunlight by the water droplets. Reason: light of shorter wavelength is scattered much more than light of longer wavelength (a) Both A and R are true and R is the correct ... of A.(c) A is true but R is false. (d) A is false but R is true.

Last Answer : (c) A is true but R is false.

Description : Sun appears red in colour at sun-rise and sunset due to – (1) the fact that sun emits only red colour at that time (2) red light having longer wave length scatters away (3) that sun Comes out of the mountains (4) that all other colours scatter away except red

Last Answer : (4) that all other colours scatter away except red Explanation: According to Rayleigh's law, the intensity of scattered light varies inversely as the fourth power of its wavelength. Sunlight consists of ... have to travel a larger part of the atmosphere because they are very close to the horizon.

Description : Sun appears red in colour at sunrise and sunset due to (1) the fact that sun emits only red colour at that time (2) red light having longer wave length scatters away (3) that sun comes out of the mountains (4) that all other colours scatter away except red

Last Answer :  that all other colours scatter away except red

Description : The sun appears red at sunrise and sunset while it appears white at noon, because A. Of refraction B. It is cooler at sunrise and at sunset C. Of diffraction leading to red end of the spectrum reaching the earth. D. Of Scattering of light due to dust particles and air molecules?

Last Answer : C. Of diffraction leading to red end of the spectrum reaching the earth.

Description : The sun appears red at sunrise and sunset while it appears white at noon because of _____ A. Refraction B. It is cooler at sunrise and at sunset C. Diffraction leading to red end of the spectrum reaching the earth D. Scattering of light due to dust particles and air molecules

Last Answer : ANSWER: D

Description : When the nurse observes diffuse swelling involving the deeper skin layers in the patient who has experienced an allergic reaction, the nurse records the finding as a) angioneurotic edema. ... the result of increased interstitial fluid and associated with disorders such as congestive heart failure.

Last Answer : a) angioneurotic edema. The area of skin demonstrating angioneurotic edema may appear normal but often has a reddish hue and does not pit.

Description : The blueness of the sky is mainly due to -------? A. The scattering of sunlight by air molecules (Answer) B. The presence of water vapor C. Absorption of blue light by the air D. Emission of blue light by the atmosphere

Last Answer : A. The scattering of sunlight by air molecules (Answer)

Description : The conditions for the production of constructive and destructive interference are reversed due to the fact that on striking the thin film -------. A. Two rays of splitted light undergo phase ... two rays of splitted light undergo phase change of 180° C. Light is diffracted, light is polarized

Last Answer : A. Two rays of splitted light undergo phase change of 180°

Description : The redness in atmosphere at Sunrise and Sunset is due to – (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Last Answer : (4) Scattering of light Explanation: The red colour in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering. At sunrise or sunset, since the Sun is low on the horizon, ... through more of the atmosphere - and therefore bounce off more molecules -than at other times of day.

Description : The redness in atmosphere at Sunrise and Sunset is due to : (1) Refraction of light (2) Reflection of light (3) Dispersion of light (4) Scattering of light

Last Answer : Scattering of light

Description : An ungrounded antenna near the ground A. acts as a single antenna of twice the height B. is unlikely to need an earth mat C. acts as antenna array D. must be horizontally polarized

Last Answer : C. acts as antenna array

Description : In what range of frequencies are most omnidirectional horizontally polarized antennas used? A. VHF, UHF B. VLF, LF C. SH, EHF D. MF, HF

Last Answer : A. VHF, UHF

Description : What is meant by referring to electromagnetic waves as horizontally polarized? A. The electric field is parallel to the earth. B. The magnetic field is parallel to the earth. C. Both the electric and magnetic fields are horizontal D. Both the electric and magnetic fields are vertical

Last Answer : A. The electric field is parallel to the earth.

Description : What is meant by referring to electromagnetic waves as horizontally polarized? A. The electric field is parallel to the earth B. Both the electric and magnetic fields are vertical C. Both the electric and magnetic fields are horizontal D. The magnetic fields is parallel to the earth

Last Answer : A. The electric field is parallel to the earth

Description : Anungrounded antennanearthe ground a. acts as a single antenna of twice the height b. is unlikely to need a ground screen c. acts as anantennaarray d. must be horizontally polarized

Last Answer : c. acts as anantennaarray

Description : What is true for intensity of scattered light according to Rayleigh's law? A. The intensity for scattering for light of largest wavelength more B. The light of smallest wavelength will be scattered ... C. All the wavelengths are scattered equally D. Intensity of light is not affected by scattering

Last Answer : B. The light of smallest wavelength will be scattered more

Description : Known as the satellite transmitted signal form a satellite transponder to earth’s station. A. Uplink B. Down link C. RHCP D. Vertically polarized

Last Answer : B. Down link

Description : Satellite signal transmitted from a satellite transponder to earth’s station. A. Vertically polarized B. Uplink C. Downlink D. RHCP

Last Answer : C. Downlink

Description : The colour of scattered light depends on (a) Size of scattering particles (b) Wavelength of light (c) Both (a) and (b) (d) None of the above

Last Answer : (c) Both (a) and (b)

Description : The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of A.300-400nm B.400-500nm C.500-600nm D.600-700nm

Last Answer : D.600-700nm

Description : In the Tyndall Effect, the intensity of scattered radiation is inversely proportional to the fourth power of the wavelength. Which one of the following colors of light would exhibit the most intense Tyndall scattering? w) yellow x) green y) orange z) violet 

Last Answer : ANSWER: Z -- VIOLET 

Description : Assertion (A) :Sunlight reaches us without dispersion in the form of white light and not as a component. Reason(R) : Dispersion takes place due to variation of refractive index for different wavelength but in vaccum the speed of ... of A. (c) A is true but R is false. (d) A is false but R is true.

Last Answer : (a) Both A and R are true and R is the correct explanation of A.

Description : which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the ... air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Last Answer : (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir.

Description : Plane-polarized light is affected by (a) Identical molecules (b) All polymers (c) Chiral molecules (d) All biomolecules

Last Answer : Chiral molecules

Description : If you cut a muffin to put butter or a spread on it, do you cut it vertically or horizontally?

Last Answer : answer:I break the top and bottom apart, eat the bottom first, then the top. No butter, unless it’s an awfully dry muffin and really needs it.

Description : What would happen if if we walked horizontally instead of vertically?

Last Answer : answer:if, if were buts… After a minute of thought: we could be centaurs

Description : How do I make an excel sheet print horizontally instead of vertically?

Last Answer : Go into the print dialog. Select the Properties button. Then select Landscape under Orientation.

Description : Why do mirrors reverse things horizontally, but not vertically?

Last Answer : They don’t “reverse” anything, they just reflect back the light that bounces off of you. Imagine a beam of light bouncing off of your right hand, hitting the mirror, and then coming back to you.

Description : Where can I find a projector screen that 'dispenses' itself horizontally as opposed to vertically?

Last Answer : The screen I have seen used at meetings is on a track that can be pivoted to pull vertically or horizontally. Perhaps it’s an option as opposed to a standard use?

Description : Solve the puzzle by following your search horizontally and vertically to find the hidden answers. -SST 10th

Last Answer : (i) Wheat and rice (ii) Kharif (iii) Protein (iv) Jowar (v) Tea and Coffee (vi) Cotton

Description : An image to be displayed in a Web page has to cover 25% of the browser window horizontally and 50% vertically. -Technology

Last Answer : An image to be displayed in a Web page has to cover 25% of the browser window horizontally and 50% vertically. The attributes height and width of the tag would be used for achieving this.

Description : Ive heard the Playstation 2 can be kept vertically or horizontally is this true?

Last Answer : Yes, all models of the Playstation 2 can be set vertically or horizontally. The system comes with a stand to help keep the system vertical. Do not turn the console horizontally to vertically while the disc is spinning or it may get scratched.

Description : An exceptional demand curve is one that moves - (1) upward to the right (2) downward to the right (3) horizontally (4) vertically

Last Answer : (2) downward to the right Explanation: A demand curve that violates the law of demand is termed an exceptional demand curve. If a household expects the price of a commodity to increase, it may ... backward slope from the top right to down left. This curve is known as an exceptional demand curve.

Description : The display size of a monitor is measured _________ A. diagonally. B. horizontally. C. vertically. D. None of the Above

Last Answer : A. diagonally.

Description : The asbestos cement pipes are generally laid A. Horizontally B. Vertically C. At an angle of 30° D. At an angle of 60°

Last Answer : ANS: B

Description : Coccidiosis is a B A. vertically transmitted disease B. horizontally transmitted disease C. None of any one D. None of the these

Last Answer : horizontally transmitted disease

Description : Infectious coryza is transmitted A A. horizontally B. Vertically C. does not spread D. None of these

Last Answer : horizontally

Description : Mareks Disease transmission occurs B A. Vertically B. horizontally C. by both above mentioned means D. None of these

Last Answer : horizontally

Description : Members of Ischnocera bite A A. Vertically B. Diagonally C. Horizontally D. All of these

Last Answer : Vertically

Description : What is true about 2D barcodes? A. barcodes cannot scan vertically B. barcodes cannot scan horizontally C. A mobile user can scan barcodes in the environment to access associated information. D. Both B and C

Last Answer : C. A mobile user can scan barcodes in the environment to access associated information

Description : A body is said to be in equilibrium if  (A) It moves horizontally  (B) It moves vertically  (C) It rotates about its C.G.  (D) None of these 

Last Answer : (D) None of these 

Description : Least force required to draw a body up the inclined plane is W sin (plane inclination + friction  angle) applied in the direction  (A) Along the plane  (B) Horizontally  (C) Vertically  (D) At an angle equal to the angle of friction to the inclined plane 

Last Answer : (D) At an angle equal to the angle of friction to the inclined plane