The type of radiation affected by greenhouse gasses is
a. UV radiation. b. IR radiation.
c. visible radiation. d. gamma radiation.
b
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In order to measure a spectral line from an atom at one particular frequency, ________.
A. that frequency must correspond to one particular electron transition in that atom B. that spectral line must be in the visible part of the electromagnetic spectrum C. that frequency must not create an excited state in that atom D. the line must be as wide as the distance between two orbitals
The Kuiper Belt is an "outer asteroid belt" consisting of what types of solar system bodies?
A) icy cometlike bodies B) asteroids C) meteoroids D) jovian planets E) terrestrial planets
As the velocity of an inertial frame of reference increases with respect to a stationary observer, Einstein's theory of special relativity predicts that the length of an object, measured in the dimension parallel to the motion of the reference frame
, will A) decrease. B) remain unchanged. C) increase. D) increase at first but start to decrease when the speed of the reference frame equals half the speed of light. E) decrease at first but start to increase when the speed of the reference frame equals half the speed of light.
Which best describes the proper time interval between two events?
A. the longest interval measured by any inertial observer B. the interval measured in the reference frame in which the two events occur a maximum distance from each other C. the interval measured in a reference frame in which the two events are simultaneous D. the interval measured in a reference frame in which the two events occur at the same place E. None of these choices are correct