Wavelength
...d by the frequency of the wave. When dealing with
electromagnetic radiation in a vacuum, this speed is the speed o...ere: λ = wavelength of a sound wave or
electromagnetic wave c = speed of light in vacuum = 299,792.458 km/s ~ 300 000 km/s = 300,000,000 m/s or ...
Optical spectrum
...ht or visible spectrum ) is the portion of the
electromagnetic spectrum that is visible to the human eye . ...range of the " optical window ", the region of the
electromagnetic spectrum which passes largely unattenuated through the Earth 's atmosphere (although blue light i...
Potential energy
...s 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 atomic scale. Everything is...
Photon
...t ) is a quantum of excitation of the quantised
electromagnetic field and is one of the elementary particles st...ayman's terms, photons are the building blocks of
electromagnetic radiation : that is, a photon is a "particle" of light , although, according to quantum mechanics ...
Magnetic resonance imaging
.... 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 high-energy state. The frequency of the pulses is governed by the Larmor Equation . As the high-ener...
Electrical energy
Electrical energy or
electromagnetic energy is a form of energy present in any elec... or magnetic field , or in any volume containing
electromagnetic radiation . The SI unit of electrical energy is the joule , while the unit used by electrical ut...
Chlorophyll
... absorbs most in the red and blue portions of the
electromagnetic spectrum , thus its intense green color. Chemical structure Chlorophyll is a chlorin pigment, which is structurally similar to porphyrin pigments such as heme . At the center of the chlorin ring is an magnesium ion. This has various side...
Absorption spectrum
...trum is a diagram depicting the wavelengths of
electromagnetic radiation absorbed by a material, usually a gas ...l. Let us consider white light, which consists of
electromagnetic radiation at all frequencies, passing through a sample of cold gas. For any collection of atoms or...