Sky Color and Eye Sensitivity – Rankers Physics

Refraction by Plane Surfaces: Practice Problem & Solution

Assertion (A): Sky appears blue. Reason (R): Sensitivity of eye is higher for blue colour as compare to violet colour.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Refraction by Plane Surfaces. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true, sky appears blue due to Rayleigh scattering of sunlight. Reason (R) is true, the human eye has higher sensitivity to blue light than violet. However, R is a factor in perception, not the direct explanation for why blue light scatters more. Both are true, but R does not explain A.

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