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ICSE Class 10 Physics Question 3 of 20

Solved 2017 Question Paper ICSE Class 10 Physics — Question 9

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Question

Question 2(d)

How is the refractive index of a material related to? [2]

(i) real and apparent depth?

(ii) velocity of light in vacuum or air and the velocity of light in a given medium?

Answer

(i) Refractive index (μ) = Real depthApparent depth\dfrac{\text{Real depth}}{\text{Apparent depth}}

(ii) Refractive index (μ) = Speed of light in vacuum or airSpeed of light in given medium \dfrac{\text{Speed of light in vacuum or air}}{\text{\text{Speed of light in given medium }}}