Refraction
The ray of light passing through this glass block has been
bent. This is called refraction.
The light ray is bent twice. When it enters the block it
bends inwards. When it leaves the block it bends outwards.
The degree of bending depends on what the materials are.
It also depends on the angle which
the light rays hit the block.
Scientists explain refraction by
thinking of light as waves.
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