Consider the following statements 1. Clear sky appears blue due to poor scattering of blue wavelength of visible light. 2. Red part of light shows more scattering than blue light in the atmosphere. 3. In the absence of atmosphere, there would be no scatte

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Q: 108 (CDS-I/2010)
Consider the following statements
1. Clear sky appears blue due to poor scattering of blue wavelength of visible light.
2. Red part of light shows more scattering than blue light in the atmosphere.
3. In the absence of atmosphere, there would be no scattering of light and sky will look black.
Which of the statements given above is/are correct ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,33,24,5,4,33,15

keywords: 

{'poor scattering': [0, 0, 1, 0], 'scattering': [1, 0, 1, 1], 'blue wavelength': [0, 0, 1, 0], 'visible light': [0, 0, 6, 6], 'clear sky': [0, 0, 1, 1], 'blue light': [1, 0, 4, 2], 'atmosphere': [1, 1, 4, 7], 'sky': [2, 1, 7, 11], 'absence': [4, 0, 3, 5], 'light': [16, 4, 34, 62]}

Option- 1: 1 only

This statement is incorrect. Clear sky appears blue due to the scattering of the blue wavelength of visible light. When sunlight passes through the Earth`s atmosphere, the blue light is scattered more than the other colors because it travels in shorter, smaller waves. This scattering causes the blue light to be redirected in different directions, making the sky appear blue to our eyes.

Option- 2: 1 and 2

This statement is incorrect. The red part of the light actually undergoes less scattering than the blue light in the atmosphere. This is why during sunrise or sunset, when the sunlight passes through a larger portion of the atmosphere, the blue light is scattered away and the longer-wavelength red light is able to reach our eyes, giving the sky a reddish hue.

Option- 3: 3 only

This statement is correct. In the absence of an atmosphere, there would be no scattering of light, and the sky would appear black. Scattering of light is a phenomenon that occurs when light bounces off particles in the atmosphere, changing its direction. Without an atmosphere, there would be no particles for the light to scatter off, resulting in a black sky.

Option- 4: 1, 2, and