The Moon's redness during a lunar eclipse is due to
A) light of lower frequencies reflected from the Moon.
B) excess infrared radiation.
C) an optical illusion.
D) refracted light from Earth's sunrises and sunsets.
E) none of the above
Answer: D
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Indicate whether the statement is true or false
The absorption lines in the infrared portion of the spectrum of a star that are produced by hydrogen are from the
a. Lyman series. b. Balmer series. c. Paschen series. d. isotopes of hydrogen. e. ions of hydrogen.
Particle A has twice as much charge as particle B. Compared to the force on particle A, the force on particle B is
a. ½ as much. b. 2x as much. c. 4x as much. d. The same.
What is the astronomical significance of 26,000 years?
What will be an ideal response?