Question

the speed of light is more in glass medium than that in water (true or false)​

Answer 1

Answer:

False.

Actually, the speed of light is constant in all media, but due to absorption and re-emition, light appears to travel faster or slower.

But still, light appears to travel faster in water than in glass.

Answer 2

Answer:

The speed of light in water is more than the speed of light in glass.

Explanation:

The relation between velocity and refractive index of the medium is given by

$n=\frac{c}{v}$.

Here n is the refractive index of the medium, c is the speed of the light in vacuum( constant value $3\times10^{8} m/s$) and v is the speed of the light in new medium.

The refractive index of the glass, n = 1.5 and refractive index of the water, n = 1.3.

Therefore, form above formula the speed of light in water is more than the speed of light in glass.

Thus the statement, the speed of light is more in glass medium than that in water is wrong.

#Learn More:

Topic: velocity and refractive index of the medium relation.

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