Physics
Explain the following:
A straight stick partly dipped in water obliquely, appears to be bent at the surface of water.
Answer
A straight stick partly dipped in water obliquely, appears to be bent at the surface of water due to refraction of light. The light rays coming from the tip C of the stick, at the surface of water undergoes refraction and bends away from the normal and appears to us as coming from point D (as shown in figure). Due to refraction of light from water to air the pencil ABC appears to be bent as ABD at the surface of water.
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