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.
Light refracts because it slows down or changes speed when it passes from one material into another. This change in speed causes the light to bend or change direction. Think of it like a car changing speed when it goes from a smooth road to a bumpy one; it changes direction slightly. This bending of light is what we call refraction, and it's why things sometimes look different when you see them through water or a glass of water, for example.
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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.
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Light refracts because it slows down or changes speed when it passes from one material into another. This change in speed causes the light to bend or change direction. Think of it like a car changing speed when it goes from a smooth road to a bumpy one; it changes direction slightly. This bending of light is what we call refraction, and it's why things sometimes look different when you see them through water or a glass of water, for example.