Why DON'T we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?
A) These stars are so hot that most of the hydrogen is ionized and the atoms cannot absorb energy.
B) These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.
C) Stars of this temperature are too cool to produce an absorption spectrum.
D) Stars of this temperature are too hot to produce an absorption spectrum.
Correct Answer:
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Q13: Q14: Q15: What makes up the neutral hydrogen atom? Q16: What is the definition of Absolute Zero? Q17: Which of the following CANNOT be measured Q19: What causes an atom to become excited? Q20: What is the lowest energy level in Q21: The energy of the first level in Q22: What is responsible for binding the electrons Q23: What does a non-ionized atom always contain?
A)one
A)zero
A)emitting
A)the
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