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When a light wave is refracted, what happens to the light wave?

Answer 1

It changes speed and is bent to travel in a different direction as it enters a medium with a different optical density.

Light slows down and is bent toward the normal (an imaginary line drawn perpendicular to the point of contact of the light) when it travels from an optically less dense medium to an optically more dense medium (with a higher index of refraction).

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Answer 2

Luca de

When a light wave is refracted, it changes direction as it passes from one medium to another, due to a change in the wave's speed.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.