Question

refractive Index of a glass is 1.8 calculate the speed of light in glass

Answer 1

Answer:

1.67×10⁸ m/s

Explanation:

Refractive index = (Speed of light in space/vacuum) ÷ Speed of light in any medium.

Here, the medium is Glass.

Speed of light in space/vacuum= 3×10⁸ m/s

∴ 1.8= 3×10⁸ / x

x= 3×10⁸/1.8

x=1.67×10⁸ m/s