The idea that light could be emitted only in discrete chunks, or quanta, instead of in continuous amounts was first put forth to explain which of the following phenomena?
A. X-rays
B. Blackbody radiation
C. Cathode rays
D. Radioactive decay
E. The spectrum of atomic hydrogen
Answer: B
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To kick a football so it won't topple end over end, kick it so the force of impact extends
A) above its center of gravity. B) through its center of gravity. C) below its center of gravity.
What statement below best describes the refraction of light?
a. The absorption of light as it travels though a dense, transparent material. b. The spreading out of white light according to wavelength. c. The change in direction of a light ray as it passes to a medium of different optical density. d. The change in direction of a ray of light as it reflects off a surface.
The largest asteroid, and probably the only one to be a spherical "world," is
A) Ceres. B) Ida. C) Vesta. D) Gaspra. E) Eros.
In order for two waves to interfere completely destructively, they must have the same amplitude
a. True b. False Indicate whether the statement is true or false