Question

write the causes of refraction​

Answer 1

Explanation:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. For example, when light travels from air into water, it slows down, causing it to continue to travel at a different angle or direction.

Answer 2

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Speed of light is different in different media, i.e., more rare medium and comparatively less in denser medium.So, when light enters a denser medium,it's speed reduces and it it bends toward the normal and when it enters rarer medium,it's speed increases and it bends towards from the normal.

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