1. visible region of electromagnetic spectrum is from 4000 angstrom to 8000 angstrom. how much energy variation will be in the photons of visible region?
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The electromagnetic spectrum is the distribution of electromagnetic radiation according to energy (or equivalently, by virtue of the relations in the previous section, according to frequency or wavelength).
Regions of the Electromagnetic Spectrum
The following table gives approximate wavelengths, frequencies, and energies for selected regions of the electromagnetic spectrum.
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