Relative to its average speed in air, the average speed of a beam of light in glass is
A) more.
B) the same.
C) less.
Answer: C
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The Doppler Effect is the apparent change in:
a) Speed b) Light c) Sound d) Frequency
A way to demonstrate to yourself that light is a wave is by
A) allowing light from two flashlights to strike a screen. B) observing light as it bends while passing from air into water. C) using a prism to separate light into its various components. D) allowing light to reflect from a mirror. E) observing the light that passes through a narrow space between your fingers.
If, in the figure below, I1 = 2 A and I2 = 6 A, which of the following is true?
The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material?
a. 21.5 g/cm3 c. 13.6 g/cm3 b. 19.3 g/cm3 d. 10.7 g/cm3