Chapter 9.3, Problem 22R

To determine

The diagram to show whether an object under water would seem deeper or closer to the surface than it actually is supposing that speed of light was greater in water than in air.

Answer to Problem 22R

The motion of boat will be up and down and boat will not move forward.

Explanation of Solution

Introduction:

The speed of light depends on the refractive index. Higher the refractive index lower will be the speed.

As it is directed in the question that the speed of light is greater in water than the speed in air, this shows that for this problem the refractive index of water is less than the refractive index of air. If the speed is faster in air then the object under water will look deeper as it will go away from the normal.

The diagram is shown below.

Figure-(1)

The refracted ray bend away of normal so the object will look deeper than actually it is.

Conclusion:

The diagram is shown in Figure-(1) and the object will look deeper.