The EM wave that has the smallest wavelength in this list is
a. ultraviolet.
b. infrared.
c. x-rays.
d. microwave.
e. gamma rays.
e
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The clearest images of Uranus shown in the text have been obtained using:
A) the Hubble Space Telescope. B) infrared ground- based telescopes at the Keck Observatory. C) the Pioneer Spacecraft. D) the Cassini Spacecraft. E) visible light ground-based telescopes at the European Southern Observatory.
The strong gravitational field of a white dwarf slows down the speed of escaping light, and results in the gravitational redshift.
Answer the following statement true (T) or false (F)
Two mirrors are at right angles to one another. A light ray is incident on the first at an angle of 30°with respect to the normal to the surface. What is the angle of reflection from the second surface? ?
A. ?30° B. ?60° C. ?45° D. ?53° E. ?75°
Approximately how large (across) is an impact crater compared to the size of the impactor?
A) the same size B) 10—20 percent larger C) 10 times larger D) 100 times larger E) 1000 times larger