Total Internal Reflection: The speed of light in a material is 0.41 c. What is the critical angle of a light ray at the interface between the material and a vacuum?
A. 24°
B. 17°
C. 19°
D. 22°
Answer: A
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The distance between Earth and the Sun is 93,000, 000 miles, or one ______________
Fill in the blank(s) with correct word
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After a switch is thrown to remove the battery from a DC LR circuit, but the circuit is still left complete, the time constant represents
a. the time rate of change of the current in the circuit. b. the time rate of change of the induced emf in the circuit. c. the magnitude of the ratio of the current to the time rate of change of the current. d. all of the above. e. only (a) and (b) above.