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Light
for other senses of this word see light disambiguation splitting light light is electromagnetic radiation with a wave...
Electromagnetic spectrum
...vlf very low frequency vf voice frequency elf extremely low frequency the electromagnetic spectrum is the range of all possible electromagnetic radiation also the electromagnetic spectrum...
Electromagnetic spectroscopy
electromagnetic spectroscopy also known as spectrophotometry is the spectroscopy of electromagnetic spectrum elec...
Light-emitting diode
Laser construction
Laser applications
...es of thick specimens at various depths military military uses of lasers include use as laser applications target designator target designator s for other weapons their use as directed energy weapon s i...
Electric light
most of the industrialized world is lit by electric lights which are used both at night and to provide additional light during the daytime these lights ar...
Gamma ray
this article is about electromagnetic radiation for the power metal band see gamma ray band gamma rays often denoted by the greek letter gamma are an energetic form o...
Infrared
infrared ir radiation is electromagnetic radiation of a wavelength longer than that of vis...
Color temperature
visible light is commonly described by its color temperature a traditional incandescent light source s color temperature is determined by comparing its hu...
Background radiation
background radiation is the ionizing radiation emitted from a variety of natural and artificial radiation sourc...
Greenhouse effect
...re to capture and recycle energy emitted by the earth surface is the defining characteristic of the greenhouse effect the greenhouse effect first discovered by joseph fourier in and first investi...
Helium-3
Laser science
laser science or laser physics is a branch of optics that describes the theory and practice of laser...
Emission
emission the word emission generally means sending something out it can be used in the following co...
Fluorescence
light in vials containing various sized cadmium selenide cdse quantum dot s fluorescence is a luminescence that is mostly found as an optical phenomenon in cold bodies in which...
Light pollution
shows sky glow one form of light pollution glow reflected from background clouds demonstrates the upward directed light partly caused by unsh...
Helium
...atmospheric value abundance may differ elsewhere for other uses of this term see helium disambiguation helium is a colorless odorless tasteless chemical element it is...
Geiger counter
a geiger counter also called a geiger muller counter measures ionizing radiation description ge...
Gas
a gas is one of the four major phase matter phases of matter after solid and liquid an...
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