Q.

A water tank appears shallower when it is viewed from top due to –

A. rectilinear propagation of light
B. reflection
C. total internal reflection
D. refraction
Answer» D. refraction
Explanation: This phenomenon is because of refraction of light. The lines of sight intersect at a higher position than where the actual rays originated. This causes the water to appear shallower than it really is.
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