CG PPT Practice Questions - Chhattisgarh Pre-Polytechnic Test Exam

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A beam of light travels from vacuum into a glass slab with a refractive index of 1.5. If the speed of light in vacuum is 3 × 10^8 m/s, what is the speed of light in the glass?

1.5 × 10^8 m/s 2.0 × 10^8 m/s 3.0 × 10^8 m/s 4.5 × 10^8 m/s

Correct Answer:

2.0 × 10^8 m/s

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