A scuba diver wants to signal to someone standing on the shore of a lake. If the diver is 1.2 m below the lake's surface, at what angle in degrees, relative to the normal, should the diver shine a flashlight beam in order for the person to see it. The index of refraction for water is 1.33.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.