Question

a convex lens of focal length 25 cm and concave lens of focal length 25 CM are placed close contact with each other. calculate the lengths power of these combinations​

Answer 1

Answer:

Answer is 0D

Explanation:

P1=1/0.25

P2=1/-0.25

Now, P1+P2

1/0.25+1/-0.25

100/25+100/-25

4+(-4)

4-4

= 0

HENCE PROVED!!!

HOPE IT HELPS