light enters form air to glass having refractive index 1.50 .(given that speed of light in vacuum is 3 * 108 m/s).using given information find the speed of light in glass?
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refractive index= speed of light in a medium/speed of light in air (or vacuum).
let the speed of light in glass be y
therefore,
1.50=3x10^8 /y
y=3x10^8/1.50
y=2x10^8m/s
let the speed of light in glass be y
therefore,
1.50=3x10^8 /y
y=3x10^8/1.50
y=2x10^8m/s
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Answer:
Refractive index of a medium (nm) = Speed of light in vacuum/Speed of light in the medium
Speed of light in vacuum (c) = 3 × 108 m/s
Refractive index of glass (ng) = 1.50
Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass
= c/ng
=3 × 108/1.50 = 2x 108 ms-1.
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