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  • (a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 × 10 8 m s –1 )

Q10.3 (a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in a vacuum is 3.0 \times 10^8 m s^{-1} )

Answers (1)

best_answer

Given,

Refractive index of the glass \mu _{glass}= 1.5

Speed of light in vacuum  c=3*10^8m/s

 Now,

As we know,

Refractive index of a medium

 \mu _{medium }=\frac{c}{v_{medium}}    where  {v_{medium}} is the speed of light in that medium.

so from here,

{v_{glass}}=\frac{c}{\mu _{glass}}=\frac{3*10^8}{1.5}=2*10^8m/s

Hence the speed of light in water is 2*10^8m/s

Posted by

Pankaj Sanodiya

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