Question

The speed of light in air is 3 X 10⁸m/s. What will be the speed of light in glass of

refractive index 1.5?​

Answer 1

Answer:

Refractive index of glass is defined as the ratio of the speed of light in vacuum to the speed of light in glass.

Refractive index of glass, n

g

=

Speed of light in glass

Speed of light in vacuum

Therefore, n

g

=

2×10

8

3×10

8

=

2

3

.

Explanation:

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