Illumination System : Diffraction, Excitation, Emission, Glare and Incandescence

Electromagnetic Radiation

• It is defined as the emission / transfer of energy in the form of electromagnetic waves associated with photons

Diffraction

• It is defined as the deviation of the direction of propagation of radiation which is determined by radiation passes through obstacle.

Energy level

• It is quantum state of energy of molecules, atom or an ion.

Excitation

• Elevation of Energy level of atoms, molecules or ions from lower energy level to higher energy level is called as excitation.

Emission

• It is defined as the release of radiant energy.

Incandescence

• It is defined as the emission of optical radiation by the thermal radiation

Glare

• It is condition of vision in which there is reduction in the ability to see objects caused by range of luminance.

Dim

• It is nothing but low level of brightness.

Bright

• It is nothing but high level of brightness.

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