A search light is being used at the edge of a tank to find a lost key at the bottom of the tank. The tank is filled to the top with a fluid for which the index of refraction is 1.62. The key is 5.922 m below the surface and 5.23 m from the edge of the tank. At what angle to the normal will the searchlight have to point in order to locate the key if the light enters the water 1 m from the edge of the tank? Answer in units of ◦ .
A search light is being used at the edge of a tank to find a lost
key at the bottom of the tank. The tank is filled to the top with a fluid for which the index of refraction is 1.62. The key is 5.922 m below the surface and 5.23 m from the edge of the tank. At what angle to the normal will the searchlight have to point in order to locate the key if the light enters the water 1 m from the edge of the tank? Answer in units of ◦ .
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