Question

Why does the speed of light change during refraction

Answer 1

Answer:

due to difference in optical densities of various media

Explanation:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density) .

Hence speed and direction of light change when traveling from one medium to another

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Answer 2

Answer:

Due to the change from one media to another media

Explanation:

When a light ray travels from one media to another media, it bent at the interface of two media then it is called Refraction.

The speed of light changes during refraction because refraction depends on the refractive index of different media

EXAMPLE: Suppose a ray of light is passing from air to water(Refractive index of water = 4/3 , Refractive index of air = 0.3333 ~=1 ) . Now we can see that Refractive index of water is greater than Refractive index of air , so ray of light faces more barriers or finds difficulty and hence the speed of light decreases depending upon the refractive index of different media.

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