Excitation

Fluorescence anisotropy can be defined quantitatively as : where is the emitted intensity parallel to polarization of the excitation light and is the emitted intensity perpendicular to the polarization of the excitation light.

In general, continuous excitation produces lower output voltages from a given input power than pulsed excitation.

The excitation energy must be greater than or equal to the energy of the electronic state in order for the excitation to occur.

There are rather strict selection rules as to the electronic configurations that can be reached by excitation by light — however there are no such rules for excitation by collision processes.

There are strict selection rules as to the electronic configurations that can be reached by excitation by light—however there are no such rules for excitation by collision processes.

These channels play an important role in both linking muscle excitation with contraction as well as neuronal excitation with transmitter release.

The two most commonly used lanthanides in life science assays are shown below along with their corresponding acceptor dye as well as their excitation and emission wavelengths and resultant Stokes shift (separation of excitation and emission wavelengths).

The statement further indicated that due to frequent failure of the two machine systems, they decided to replace the excitation systems immediately.

Absorption bands in the infrared are due to modes of vibrational excitation in water vapor.

Additionally to the electronic excitation states which are known from atoms, molecules are able to rotate and to vibrate.

Although energy generated by stimulated emission is always at the exact frequency of the field which has stimulated it, the above rate equation refers only to excitation at the particular optical frequency corresponding to the energy of the transition.

A plot of amplitude vs. excitation frequency will have a peak centered at the resonance frequency.

As electrons descend to lower energy levels, a spectrum is emitted that represents the jumps between the energy levels of the electrons, but lines are seen because again emission happens only at particular energies after excitation.

Atoms also have distinct x-ray spectra that are attributable to the excitation of inner shell electrons to excited states.

Basic transformer parameters and construction Power transformer over-excitation condition caused by decreased frequency; flux (green), iron core's magnetic characteristics (red) and magnetizing current (blue).

Berkelium(III) phosphate (BkPO 4 ) has been prepared as a solid, which shows strong fluorescence under excitation with a green light.

Detection and measurement The ionizing or excitation effects of beta particles on matter are the fundamental processes by which radiometric detection instruments detect and measure beta radiation.

EMR in the visible light region consists of quanta (called photons ) that are at the lower end of the energies that are capable of causing electronic excitation within molecules, which leads to changes in the bonding or chemistry of the molecule.

Flow over a cavity in a surface can result in excitation of a feedback loop and nearly pure tones.

For example, one can say for a given transition that it corresponds to the excitation of an electron from an occupied orbital to a given unoccupied orbital.