Question

3.
in +
A lens is made by two watch glasses by attaching together with their concave faces towards each o
The radius of curvature of each surface is 20 cm. If the lens prepared contains air and is immersed
water, it behaves as
8.
a) Converging lens of focal length 20 cm b) Converging lens of focal length 30cm
c) Diverging lens of focal length 20cm
d) Diverging lens of focal length 30cm​

Answer 1

Answer:

c. diverging lens of focal length 20 cm