As the sunlight passes through the atmosphere, the rays are scattered by tiny particles of dust, pollen, soot and other minute particulate matters present there. However, when we look up, the sky appears blue during mid-day, because

examrobotsa's picture

Submitted by examrobotsa on

Q: 33 (CDS-II/2010)
As the sunlight passes through the atmosphere, the rays are scattered by tiny particles of dust, pollen, soot and other minute particulate matters present there. However, when we look up, the sky appears blue during mid-day, because

question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,30,14,30,6,5,3

keywords: 

{'sunlight': [0, 0, 1, 0], 'blue light': [1, 0, 4, 2], 'sunlight combine': [0, 0, 1, 0], 'atmosphere': [1, 1, 4, 7], 'sky': [2, 1, 7, 11], 'dust': [2, 0, 1, 3], 'pollen': [1, 0, 0, 0], 'ultra violet': [0, 0, 1, 0], 'rays': [0, 0, 1, 0], 'other minute particulate matters': [0, 0, 1, 0], 'yellow component': [0, 0, 1, 0]}

Option 1: Blue light is scattered most - This option states that blue light is scattered the most in the atmosphere which is why the sky appears blue. When sunlight enters the atmosphere, it interacts with tiny particles such as dust, pollen, and soot. These particles are much larger than the wavelengths of blue light, causing them to scatter more compared to other colors. As a result, the blue light is redirected in all directions, including towards our eyes, making the sky appear blue during mid-day.

Option 2: Blue light is absorbed most - This option suggests that blue light is absorbed the most in the atmosphere, resulting in the sky appearing blue. However, this statement is incorrect. Blue light is actually scattered the most, not absorbed, which is why the sky appears blue.

Option 3: Blue light is reflected most - This option proposes that blue light is reflected the most in the atmosphere, causing the sky to appear blue. However, this statement is also incorrect. The color of the sky is mainly due to scattering, not reflection.

Option 4: Ultra-violet and yellow components of sunlight combine - This option does not accurately explain why the sky appears blue. The color of the sky is primarily caused by the scattering of blue light, not the combination of