A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

Convex mirror of focal length 10 cm

Concave mirror of focal length 40 cm

Concave mirror of focal length 60 cm

Concave mirror of focal length 10 cm

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

1F=2f+1fm. Here fm=∞, hence F=f2=10cm

Watch 3-min video & get full concept clarity