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A uniform background radiation in the microwave region of the spectrum is observed in all directions in the sky. It shows the wavelength dependence of a "black body" radiator at about 3 Kelvins ...
The basic hydrogen energy level structure is in agreement with the Bohr model. Common pictures are those of a shell structure with each main shell associated with a value of the principal quantum ...
The frequency and wavelength of visible light is a very narrow band in the electromagnetic spectrum. Its wavelength lies between 400 and 750 nm
NASA page about electromagnetic waves with descriptions of such waves and their uses.Covers radio waves, microwaves, infrared, visible light, ultraviolet (UV), x-rays and gamma rays.
Teachers can create their own lessons on Astrophysics Research, Artificial Earth Orbiting Satellite, Sine Waves, Electromagnetic Spectrum, Images of the Universe in Different Wavelengths, Satellite ...
The Physical Sciences Resource Center (PSRC) is a project of the American Association of Physics Teachers (AAPT) which provides teacher resources for the entire spectrum of learners.
This site allows the temperature of the Black Body applet to be set in two ways. The applet will then show you the spectrum and the apparent color of the object. Temperature can also be related to ...
Sir Owen Richardson (1879 - 1959) worked on thermionics, photoelectric effects, magnetism, the emission of electrons by chemical action, the theory of electrons, the quantum theory, the spectrum of ...
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