The chemical composition of stars can be determined from lines in their spectra.
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Q16: In an energy level transition from the
Q17: The photoelectric effect occurs when electrons are
Q18: In a blackbody,the energy of the oscillating
Q19: The element helium was discovered by studying
Q20: An excited atom can lose energy by
Q22: The fact that two electrons cannot occupy
Q23: Characteristic peaks occur in an x-ray spectrum
Q24: As the intensity of light is increased
Q25: The energy level diagram for hydrogen
Q26: A laser can be used for very
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