Question

A boy holds a laser pointer at the bottom of the pond and light ray makes an angel to the surface 1)35°. 2)40°. 3)49° in which case the light ray doesn't cross the surface of water? why​

Answer 1

Answer:

3)49

Explanation:

because the critical angle of water is 48 approximately so when the incident angle is same with that there is no deviation

Answer 2

Answer:

49 degrees

Explanation:

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