Rayleigh Scattering – Rankers Physics

Total Internal Reflection: Practice Problem & Solution

Assertion (A): Blue colour of sky is due to scattering. Reason (R): According to Rayleigh blue colour shows more scattering 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

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Total Internal Reflection. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true, blue sky is a result of Rayleigh scattering. Reason (R) is false; Rayleigh scattering is inversely proportional to the fourth power of wavelength (\(1/lambda^4\)), meaning violet light (shorter wavelength) scatters more than blue light. Thus, A is true and R is false.

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