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Two plano concave lenses of glass of ref...

Two plano concave lenses of glass of refractive index 1.5 have radii of curvature of 20 cm and 30 cm. If they are placed in contact with curved surfaces towards each other and the space between them is filled with water `(mu_(w)=4/3)`, find the focal length of the system.

A

`-50` cm

B

95 cm

C

`-72` cm

D

40 cm

Text Solution

Verified by Experts

The correct Answer is:
C
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