Question

(iii) The bottom of a pond appears raised?
give me ans for 2marks​

Answer 1

The bottom of a pond appears to be raised due to the phenomenon of REFRACTION.

1. While having a look into the pond, light travels from denser medium(water) to rarer medium(air) after reflecting from the surface of the pond.
2. According to the laws of refraction, when a ray of light passes from a denser medium to a rarer medium, it travels away from the normal and when it travels from a rarer medium to a denser medium , it bends towards the normal.
3. This creates illusion of raised bottom as in this case of the pond.

Answer 2

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1. The rays of light coming from the bottom of a pond bend away from the normal as they travel from water (denser medium) to air (rarer medium).

2. Hence, they appear to come from a point above the actual point from which they come.

Therefore, the bottom of a pond appears raised.

Hope it helps!

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