Because of refraction, an object 3 meters below the surface of a lake appears to be 4 meters below the surface 2.30 2.35 2.45 A diver inadvertently Jeft his keys in his shorts when he was swimming The keys- fell out of his shorts and went to the bottom of his swimming pool. The keys appeared to be 9 feet below the surface. What is the difference between the actual depth of the keys and the apparent depth?