Light strikes a diamond (n = 2.42) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?

A. 21°
B. 30°
C. 38°
D. 69°
E. 71°


Answer: A

Physics & Space Science

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A) 0.905 µm B) 1.81 µm C) 2.20 µm D) 3.62 µm E) 4.52 µm

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Indicate whether the statement is true or false

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At least 70% of stars have planets. How many planets can astronomers reasonably claim exist in the Milky Way galaxy?

A) at least 70 billion B) at least 1 trillion C) at least 8 D) at least 3000

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A boulder following a straight-line path at constant velocity has

A) a net force acting upon it in the direction of motion. B) zero acceleration. C) no forces acting on it. D) none of the above

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