A thin equiconvex lens is made of = glass of refractive index 1.5 and its focal length in air is 0.2m. If it acts as a concave lens of 0.5m focal length when dipped in a liquid, the velocity of light in the liquid is

A thin equiconvex lens is made of = glass of refractive index 1.5 and

1.	A thin equiconvex lens is made of = glass of refractive index 1.5 and its focal length in air is 0.2m. If it acts as a concave lens of 0.5m focal length when dipped in a liquid, the velocity of light in the liquid is
Answer» `1.2 TIMES 10^8 ms^-1` `1.6 times 10^8 ms^-1` `1.8 times 10^8 ms^-1` `2.4 times 10^8 ms^-1` ANSWER :B