PH-476

Refraction

Physics · Secondary 3 · Medium · Refraction

A light ray travels from air into a block of glass. The speed of light in air is

3.0\times10^8\,\text{m s}^{-1}

and in the glass it is

2.0\times10^8\,\text{m s}^{-1}

. What is the refractive index of the glass?

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