The dark lines in the Sun's spectrum are due to light that is
A) absorbed by the Sun's atmosphere.
B) emitted by the Sun.
C) reflected by the Sun.
D) none of the above
Answer: A
You might also like to view...
The amount of energy needed to pull an electron completely away from the nucleus is called the Coulomb energy
a. True b. False Indicate whether the statement is true or false
The period-luminosity relationship is primarily used for main-sequence stars
a. True b. False Indicate whether the statement is true or false
The maximum distance that the particles of a wave's medium vibrate from their rest position:
a) Frequency b) Wavelength c) Wave Speed d) Amplitude
Suppose that there are 10 billion (10,000,000,000,000 ) habitable planets in our galaxy, that 1 in 5 habitable planets has life, that 1 in 1000 planets with life has at some point had an intelligent civilization, and that 1 in 1000 civilizations that
have ever existed is in existence now. How many civilizations would exist at present? A) 200,000 B) 2,000,000 C) 20,000 D) 20,000,000