Question

1.When light travels from air to glass, its speed changes from 3 x 10^8 ms^-1 to 2 x 10 ms^-1. the refractive index of glass is ____________ .

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Answer 1

Answer:

1.52ms^-1............

Answer 2

Answer:

Glass refractive index is defined as the ratio between the speed of light in the vacuum and the speed of light in the glass.

Refractive index of glass (ng) = Speed of light in vacuum/speed of light in the glass.

ng = (3 ×108)/ (2 ×108)

ng = 1.5