A Flashlight Beam Makes an Angle of 60° with the Plane

question 134

Multiple Choice

A flashlight beam makes an angle of 60° with the plane of the surface of a calm lake before it enters the water. In the water what angle does the beam make with the plane of the surface? The
Index of refraction of water is 1.33.

• A) \(30 ^ { \circ }\)
• B) \(22 ^ { \circ }\)
• C) \(68 ^ { \circ }\)
• D) \(0 ^ { \circ }\)
• Е) \(60 ^ { \circ }\)

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