Question

please answer this time​

Answer 1

Answer:

Speed of light in Ruby is ( 3 / 7 ) x 10^8 m / s.

Explanation:

From the properties of light, we know that the refractive index of a medium is the ratio of speed of light in vaccum to the speed of light the given medium.

We know that speed of light in vaccum is 3 x 10^8 m / s.

Therefore,

= > Refractive of the transparent medium = ( speed of light in vaccum ) / ( speed of light in that medium i.e. Ruby )

= > 1.7 = ( 3 x 10^8 m / s ) / ( speed of light in Ruby )

= > Speed of light in Ruby = ( 3 x 10^8 ) / 1.7 m / s

= > Speed of light in Ruby = ( 3 / 1.7 ) x 10^8 m / s.

Hence, speed of light in Ruby is ( 30 / 17 ) x 10^8 m / s.