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Light travels with speed of 2x10^8 m/s in crown glass of refractive index 1.5 . What is the speed of light in dense flint glass of refractive index 1.8 ?

Light travels with speed of 2x10^8  m/s in crown glass of refractive index 1.5  .  What is the speed of light in dense flint  glass of refractive index 1.8 ?

Grade:12

3 Answers

VIRAJ
18 Points
8 years ago

is the answer 1.67x108.........

mukunda
33 Points
8 years ago

hi    ......             take it this is audio type solution for your problem and answer is 1.97 x 108 m/s  .  bye..

suhel
44 Points
8 years ago

light travels with speed va = 2x10^8m/s

glass refractive index na = 1.5

flint glass refractive index nb = 1.8

To find :-

        speed of light ij dense flint glass vb

                      na/nb = vb/va

                     1.5/1.8 =vb/2x10^8m/s

                     0.8333x2x10^8 = vb

                     vb=1.6666x10^8

        therefore, the speed of light in dense flint glass is 1.666x10^8m/s

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