The sun appears at an angle of 48.4° above the horizontal as viewed by a dolphin swimming underwater. what angle does the sunlight striking the water actually make with the horizon? (assume nwater = 1.333. enter an answer between 0° and 90°.)

4.57 degree

Explanation:

As the dolphin is under water, so the angle is angle of refraction which is equal to 48.4 degree.

refractive index of water, n = 1.333

Let the angle of incidence which is the angle between the incident ray and the normal is i.

By use of Snell's law

i = 85.43 degree

Angle made with the horizon = 90 - 85.43 = 4.57 degree

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