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  • Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s^1.

Q.   Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in a vacuum is 3 \times 108\: m\: s^1.

Answers (1)

best_answer

As we know, from the definition of the refractive index that 

 Refractive Index :

 \mu=\frac{c}{v}

Where, v = Velocity of light in the medium and 

            c = Speed of light in vacuum

So putting those given values we get,

1.5 = \frac{3\times10^ {8}}{v}

v=\frac{3\times10^8}{1.5}

v= 2\times10^8m/s

Hence the speed of the light in the glass is   2\times10^8m/s.

 

Posted by

Pankaj Sanodiya

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