A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, then its focal length will be

Options

(a) -160 cm
(b) -100 cm
(c) (+10 cm)
(d) (+ 100 cm)

Correct Answer:

-160 cm

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.