Underwater Laser Beam Refraction (80°) · CAP 2022 #13
Physics · optics
Problem
A diver shines a beam of light from a laser at 80° to the surface as shown below. How high above the water surface will the laser beam hit the vertical wall placed 2 m away from the point A (the place where the laser beam hits the surface of the water)?
a) About 15m
b) About 8 m
c) About 2 m
d) About 0.2 m
e) It will never go above the water