The light we see from the Sun comes from which layer?
A) Troposphere
B) Chromosphere
C) Photosphere
D) Ionosphere
E) Corona
C
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The angle of incidence
A) must equal the angle of reflection. B) is always less than the angle of reflection. C) is always greater than the angle of reflection. D) may be less than or equal to the angle of reflection. E) may be greater than or equal to the angle of reflection.
Radiation dosages based on potential damage is in
A) rads. B) rems. C) joules. D) none of the above
The post-Newtonian revolution began in 1900 when
A) Max Planck introduced the quantum of energy. B) Einstein introduced the general theory of relativity. C) Einstein introduced the special theory of relativity. D) Werner Heisenberg had one beer too many and declared that he was uncertain about his own identity. E) Michelson declared that the Newtonian age had ended.
What evidence leads astronomers to conclude that the universe contains a mysterious dark energy?
A) The expansion of the universe is accelerating with time. B) The gravity of distant galaxies is stronger than that of galaxies nearby. C) Studies of galactic motion indicate that there is more matter in the universe than we can account for with stars and gas. D) Stars shine much more brightly than we would expect from nuclear fusion. E) The existence of such dark energy is the only way to account for evil in the universe.