Class 10

Light - Reflection and Refraction question bank (Science)

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Q1.

A ray of light enters from air into water of refractive index $n = \dfrac{4}{3}$. What is the speed of light in water? (Speed of light in vacuum $c = 3 \times 10^8\text{ m/s}$):

(A)

$3.0 \times 10^8\text{ m/s}$

(B)

$2.0 \times 10^8\text{ m/s}$

(C)

$2.25 \times 10^8\text{ m/s}$

(D)

$1.5 \times 10^8\text{ m/s}$

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