Question

A boy holds a laser pointer at the bottom of a pond and the light ray makes an angle to the surface

i) 35° ii) 40° iii) 49°.

In which case the light ray does not cross the surface of water ? Why?​

Answer 1

Answer:

49 degrees because the critical angle of water is 42 degrees thus the refracted ray of 48 degrees is more than 42 thus forms 90 degrees angle