what does the word LASER stand for?what are the four characteristics of a wave?wavelengthfrequencyvelocityamplitudewhat
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is the common standard of measure used for a wavelength?
explain the correlation between the wavelength, energy, frequency, amplitude, and penetration to the surface
what is the range for visible light? (nm)
what are actinic rays?
what wavelengths are considered to be actinic?
what wavelengths for IR light?
what is spontaneous emission?
what
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