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.
Question 2
Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because
a. the signals are so weak in the radio region.
b. the wavelength of radio waves is much longer than the wavelengths of visible light.
c. radio telescopes are generally much smaller in diameter than optical telescopes.
d. it is very difficult to detect radio waves.
e. radio telescopes don't use solid mirrors.
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