refraction is the change in direction of waves due to a change in its speed.this is most commonly observed when a wave passes from one medium to another at an angle.refraction is described as Snell's law which states that the angle of incidence is equal to the angle of refraction,it is also known as bending of light.
one of the effect of refraction is apparent deapth.we can conclude by doing an experiment by putting a coin into a basin and pour water into it. We would then see that the coin somehow floats.this happens when rays of lights from the hidden coin bend on reaching the water's surface and arrive at the eye,so that the coin could be seen.Refraction of light causes objects in water to appear shallower.so,this explains why the coin appears shallower then the actual height is.
Name:rachel
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