A BL Lac object is the same as a
a. Type 1 Seyfert.
b. Type 2 Seyfert.
c. double-lobed radio galaxy.
d. blazar.
e. quasar.
D
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Motion in a circle at constant speed is motion with
a. constant acceleration. b. constant velocity. c. both of the above d. none of the above
The person who first explained the photoelectric effect was
a. Max Planck b. Albert Einstein c. Neils Bohr d. Erwin Schroedinger e. Werner Heisenberg
If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects?
A) The one with the large redshift is moving toward us faster than the one with the small redshift. B) The one with the large redshift is moving away from us, and the one with the small redshift is moving toward us. C) The one with the large redshift is moving away from us faster than the one with the small redshift. D) The one with the large redshift is hotter and therefore is putting out more radiation. E) The one with the large redshift is redder than the other one.
A paint pigment that absorbs blue light and gives off red light
A) is fluorescent. B) is phosphorescent. C) can be both of these D) neither of these