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

question 85

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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