If light bounces off the surface of a material, the change in direction is called:
a. Reflection
b. Refraction
c. Interference
d. Diffusion
Ans: a. Reflection
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The overall dimming of starlight by interstellar matter is called:
A) extinction. B) reddening. C) absorption. D) emission. E) scattering.
Light in a transparent material that has an index of refraction of 1.333 strikes the boundary with another transparent material for which the index of refraction is 1.010
What is the critical angle for total internal reflection between these two materials?
A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is
A. 32 N. B. 30 N. C. 24 N. D. 23 N. E. 19 N.
The most important force in the hydrogen atom is
a. the nuclear force. b. the gravitational force. c. the electromagnetic force. d. none of these.