A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about -
Text Solution
Verified by ExpertsThe correct answer is:
A
= – 
+ 
⇒ f = 
if moves by 0.1 cm then
u = (10 – 0.1) = 9.9 cm
so – 
= 
+ 
⇒ v ′ = 20.4 cm
so away from the mirror by 0.4 cm.
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