Question

A convex lens is put from a light source and it makes a sharp image on a screen, kept from the lens. Now a glass block (refractive index 1.5) of thickness is placed in contact with the light source. To get the sharp image again, the screen is shifted by a distance . Then is :

A

away from the lens

B

away from the lens

C

towards the lens

D

Medium
Solution
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Correct option is A)


Given,


Now due to glass plate,  shift =

New



Shift, d =  

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