An empty tank has concave mirror as its bottom. When sunlight falls normally on the mirror, it is focused at a height of 
from the mirror. If the tank is filled with water upto a height of 
, then the sunlight focusses at (refractive index of water 
)
A
above water level B
above water level C
below water level D
below water level.
Text Solution
Verified by ExpertsThe correct answer is:
B
Sun at infinity, 
Focused at a height, 
Refractive index of water, 
From the mirror formula
When water is filled in the tank up to a height of 
, the image formed by the mirror will act as virtual object for water surface.
Which will form its image such that
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