The apparent depth of needle lying a the bottom of the tank, which is filled with water of refractive index 1.33 to a height of 12.5cm is measured by a microscope to be 9.4cm. If water is replaced by a liquid of refractive index 1.63 upto the same height. What distance would the microscope have to be moved to focus on the needle again?
Text Solution
Verified by ExpertsThe correct answer is:
A
: Apparent depth
Here, Real depth= 12.5 cm and 
Apparent depth 
Now the microscope will have to shift from its initial position to focus 
cm depth object to focus 
depth object.
Shift distance 
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