Published by:
CGP EDU Academic Team
Published on: August 12, 2026
PART - A (PHYSICS)
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 fro the lens B
0
C
towards the lens D
away from the lens
Text Solution
Verified by ExpertsThe correct answer is:
D
If 
Glass plate shift 
So, new 
After solving we get,
. Hence, shift 
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