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ICSE Class 10 Physics Question 3 of 20

Solved 2018 Question Paper ICSE Class 10 Physics — Question 8

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Question

Question 2(c)

(i) State the relation between the critical angle and the absolute refractive index of a medium.

(ii) Which colour of light has a higher critical angle? Red light or Green light. [2]

Answer

(i) μ = 1sin C\dfrac{1}{\text{sin C}} where μ is the refractive index of the medium and C is the critical angle.

(ii) The critical angle of Red light is higher than that of green light.