Physics, asked by Anonymous, 18 days ago

two plano convex lenses of focal length 10 cm and 20 cm are placed in contact with each other . effective focal length of the image formed by the lens is​

Answers

Answered by shevaledigamber8
0

Answer:

Correct option is

C

+5D

Power of the concave lens =

f

1

=

−20

100

D=−5D

Power of the convex lens =

f

1

=

10

100

D=+10D

Thus, the power of the combination =P

1

+P

2

=+10D−5D=+5D

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