When a person standing underwater looks upward at a tree located on the bank, the tree appears to be at a position different from its original location. Which of the following principles is responsible for this apparent shift in the position?
Light rays from the tree bend due to refraction at the water-air interface.
Light travels from a denser medium (water) to a rarer medium (air) and bends away from the normal at the water-air interface. This bending of light rays, called refraction, causes the tree to appear at a position different from its actual location.
Hence, the correct answer is Light rays from the tree bend due to refraction at the water-air interface (B).
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