When light passes through a prism, it refracts (bends) at both the entry and exit surfaces because the speed of light changes as it moves from one medium to another, resulting in a change in direction.
Here's a more detailed explanation:
Refraction:
Light bends (refracts) when it travels from one medium to another, like from air to glass or glass to air, because the speed of light changes.
Prism:
A prism is a transparent object, typically made of glass, with two non-parallel surfaces that refract light.
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