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A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
When a ray of light passes from air (rarer medium) into a block of glass (denser medium), it bends towards the normal.
Explanation
The angle of refraction or the amount of bending of light depends on the refractive index
1. When light passes through a low refractive index, like air (faster medium or optically rarer medium) to a high refractive index, like glass(slower medium or optically denser medium), its speed decreases and bends towards the normal.
2. When light passes through a high refractive index, like glass (slower medium or optically denser medium) to a low refractive index, like air (faster medium or optically rarer medium) its speed increases and bends away from the normal.
Updated on: 10-Oct-2022
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