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

Solution Explained:

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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