As Shown in the Figure, a Laser Positioned on a Ship

question 86

Multiple Choice

As shown in the figure, a laser positioned on a ship is used to communicate with a small research submarine resting on the bottom of a lake. The laser is positioned 12 m above the surface of the water, and it strikes the water 20 m from the side of the ship. The water is 58 m deep and has an index of refraction of 1.33. How far horizontally is the submarine from the side of the ship? (Assume all numbers are accurate to three significant figures.)

• A) 69 m
• B) 49 m
• C) 89 m
• D) 59 m
• E) 79 m

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