Question

A light ray coming from the sun falls on the water surface from air at an angle of 45$°$ as shown. If the ray got refracted by 30$°$ on passing through the air-water interface, then calculate the speed of light in water.

• A. 3/$\sqrt{2}$ x 10${}^8$ ms${}^{-1}$
• B. 1.5 x 10${}^8$ ms${}^{-1}$
• C. $\sqrt{2}$/3 x 10${}^8$ ms${}^{-1}$
• D. $\sqrt{2}$ x 10${}^8$ ms${}^{-1}$

Answer 1

The correct option is A 3/$\sqrt{2}$ x 10${}^8$ ms${}^{-1}$