... is a diagram depicting the wavelengths of electromagnetic
radiation absorbed by a material, usually a gas ... Let us consider white light, which consists of electromagnetic
radiation at all frequencies, passing through a ... not just in the direction in which the electromagnetic
radiation was originally travelling. If the ...
... Electrical energy or electromagnetic
energy is a form of energy present in any ... or magnetic field , or in any volume containing electromagnetic
radiation . The SI unit of electrical energy ... Electrical energy is also identical to the electromagnetic
fields surrounding a transmission line , the ...
... ) is a quantum of excitation of the quantised electromagnetic
field and is one of the elementary particles ... terms, photons are the building blocks of electromagnetic
radiation : that is, a photon is a "particle" of ... denoted X , an X-ray ).
radiation, from radio waves to gamma rays, is ...
... or visible spectrum ) is the portion of the electromagnetic
spectrum that is visible to the human eye . ... of the " optical window ", the region of the electromagnetic
spectrum which passes largely unattenuated ... red light, which is the reason the sky is blue). electromagnetic
radiation outside the optical wavelength range is ...
... by the frequency of the wave. When dealing with electromagnetic
radiation in a vacuum, this speed is the speed ...
λ = wavelength of a sound wave or electromagnetic
c = speed of light in vacuum = ... (in megahertz).
When light waves (and other electromagnetic
waves) enter a medium, their wavelength is ...
... elastic material forces the atoms very slightly further apart. Powerful electromagnetic
forces try to keep the atoms at their optimal distance and so elastic potential is actually electromagnetic
potential. Having said that, scientists rarely talk about forces on an ...
... and ultimately to convert carbon dioxide and water to carbohydrates and oxygen . Chlorophyll absorbs most in the red and blue portions of the electromagnetic
spectrum , thus its intense green color.
Chlorophyll is a chlorin pigment, which is structurally similar to porphyrin ...
Magnetic resonance imaging
... field or anti-parallel . While the proportion is nearly equal, slightly more are oriented parallel. The tissue is then briefly exposed to pulses of electromagnetic
energy in a plane perpendicular to the magnetic field, causing some of the magnetically aligned hydrogen nuclei to assume a temporary non-aligned ...