Question

A double convex lens of focal length 30 cm is made of
glass of R.I. 1.6. When it is immersed in a liquid, the
focal length is found to be 90 cm. The R.I. of the liquid is
(a) 1.33
(b) 1.5
(c) 1.4
(d) 1.42​

Answer 1

HEYA GM ❤

SEE....THE ATTACHMENT....

★REFRACTIVE INDEX OF LIQUID IS 4/3 OR 1.33..

TQ ❤ ❤