Light of different colors in a vacuum travel at
A) different speeds.
B) the same speed.
C) the same speed in both a vacuum and all materials.
Answer: B
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For hydrogen, the transition from the first to third excited state produces
A) an infrared line. B) an ultraviolet line. C) a red emission line. D) a blue green absorption line. E) a violet emission line.
Magenta light is a mixture of
A) red and blue light. B) red and cyan light. C) red and yellow light. D) yellow and green light. E) none of the above
From Earth, in which type of constellation might you find the planet Saturn?
a) Only in a constellation near the South polar axis of Earth b) Only in a Zodiac constellation c) Only in the same constellation as the Moon. d) Only in a constellation near the North polar axis of Earth e) Only in the same constellation as the Sun.
On which of these assumptions do Ptolemy and Copernicus agree?
A) The Earth must be the center of all motion in the Cosmos. B) All orbits must be perfect circles. C) The Sun was bigger than the Earth. D) Venus must always stay between us and the Sun. E) The Sun must orbit us, but the planets do orbit the Sun.