Why does the Doppler effect lead to a shift in the wavelength of the light emitted by a star, but to a broadening of emitted light in a gas? Check all that apply. The wavelength of a star is shifted because all the photon emitters are moving in the same direction with respect to the observer. The wavelength of a star is shifted because all the photon emitters are moving randomly and with equal probability in all directions with respect to the observer. Emitted light in a gas is broadened because the atoms move randomly and with equal probability in all directions with respect to the observer. Emitted light in a gas is broadened because the atoms move in opposite directions with respect to the observer. Submit Previous Answers Request Answer X Incorrect: Try Again: 4 attempts remaining
Electronic Transitions and Spectroscopy
The term “electronic” connotes electron, and the term “transition” implies transformation. In a molecule, the electrons move from a lower to a higher energy state due to excitation. The two energy states, the ground state and the excited state are the lowest and the highest energy states, respectively. An energy change is observed with this transition, which depicts the various data related to the molecule.
Photoelectron Spectroscopy
Photoelectron spectroscopy (PES) is a part of experimental chemistry. It is a technique used in laboratories that involves projecting intense beams of radiation on a sample element. In response, the element ejects electrons for which the relative energies are measured.
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