The absorption lines in the visible 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 2There are _______ nanometers in one meter.
a. 1 103
b. 1 103
c. 1 109
d. 1 109
e. 400
Question 3Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?
a. There is no hydrogen in stars this hot.
b. The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy.
c. These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.
d. Stars of this temperature are too cool to produce an absorption spectrum.
e. Stars of this temperature are too hot to produce an absorption spectrum.
Question 4Violet light has a wavelength of approximately _______.
a. 400 nm
b. 4000 nm
c. 7000 nm
d. 700 nm
e. 3108 m
Question 5Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?
a. There is no hydrogen in stars this cool.
b. The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy.
c. These stars are so cool that nearly all of the hydrogen atoms are in the ground state.
d. Stars of this temperature are too cool to produce an absorption spectrum.
e. Stars of this temperature are too hot to produce an absorption spectrum.
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