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
You might also like to view...
If our eyes were sensitive only to X rays, the world would appear __________.
A. gray, black, and white like a medical X ray B. brighter than normal because X rays carry more energy than visible light photons C. dark because X-ray light does not reach Earth’s surface D. green, yellow, and orange, because those are the colors of X rays
In the Hertzprung—Russell diagram most stars are found
A) on the main sequence B) in the red giant region C) in the white dwarf region D) in the supergiant region
The distance between Earth and the Sun is 93,000, 000 miles, or one ______________
Fill in the blank(s) with correct word
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.