PHOTONS
the wavelength decreases, the energy of the photon does increase. But compared. to the energies of ordinary objects, photon energies are tiny. How many photons are in a beam of light? Each photon in a beam of 670 nm red light carries 2.97x10-19 J of energy. A laser pointer delivers about 0.005 Joules of energy each second in its beam. ................
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