Energy Levels: When an electron jumps from an orbit where n = 4 to one where n = 2
A. a photon is emitted.
B. a photon is absorbed.
C. two photons are emitted.
D. two photons are absorbed.
E. None of the given answers are correct.
Answer: A
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a. Protostar, pre-main sequence. b. Protostar, white dwarf. c. Protostar, main-sequence. d. Main-sequence, white dwarf.
The Lyman series lines of hydrogen all lie in the infrared
a. True b. False Indicate whether the statement is true or false
Exhibit 18-1The figure below shows wave crests after a stone is thrown into a pond.
Use this exhibit to answer the following question(s).
Refer to Exhibit 18-1. The phase difference in radians between points A and B is
A.
B.
.C.
.D.
E.
.The potential of a uniformly charged sphere is lowest at
A) infinity. B) a distance from the sphere equal to its radius. C) a distance from the sphere equal to its diameter. D) the surface of the sphere. E) the center of the sphere.