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Why don't we see hydrogen Balmer lines in the spectra with temp 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 the hydrogen atoms are in the ground state.
d. Stars of this temp are too cool to produce an absorbtion spectrum
e. Stars of this temp are too hot to produce an absorbtion spectrum

2007-03-07 07:29:42 · 2 answers · asked by Anonymous in Science & Mathematics Astronomy & Space

2 answers

The answer is c. The temperatures are not hot enough to get the hydrogen atoms out of the ground state. Therfore they cannot emmit photons to cause the lines. Balmer lines are the strongest around 10,000K.

2007-03-07 10:41:53 · answer #1 · answered by Anonymous · 0 0

This one is fairly obvious when you look at the question and the available answers. A star can't have a spectrum matching an element that isn't there. Only A states that there is a lack of Hydrogen in the star. None of the other answers is even remotely true.

2007-03-07 15:40:21 · answer #2 · answered by CurazyJ 2 · 0 0

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