Question

8.
between two mirrors is 41.]
The focal length of a thin lens made from the material of refractive index 1.5 is 20 cm. When
it is placed in a liquid of refractive index 1.33, its focal length will be .... . cm.
(A) 80.81
(B) 45.48
(C) 60.25
(D) 78.23​

No other comments only question the answer with compulsory counting.... .....

Answer 1

Answer:

45.48 it's focal length