a. As you can see from this figure, methane absorbs at two regions in the infrared at wavenumbers of 3700 and 1500 cm1. Which of these absorptions is considered to cause the greenhouse effect? And why? Wavelength (µm) 2.5 4.0 6.0 10 100 75 50 Percent transmittance
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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