Question

what is the speed of light in a medium of refractive index 2.5 if its speed in air is 3,00,000 km/ s​

Answer 1

Answer:

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.

Explanation:

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Answer 2

Refractive index of medium = 6/5 = 1.2

Speed of light in air = 3,00,000km/s

We know that

Refractive index of the medium = speed of light in air/speed of light in medium

1.2 = 300000/speed of light in medium

Speed of light in medium = 250000km/s