In this unit we concentrate on the interactions between ...

a) Frequency of light emitted, b) energy of a single photon in joules, c) energy of a photon in electron volts, d) momentum of a single photon, e) number of photons emitted in a quarter second burst of laser light and f) length of the beam. a) c = f( or f = c/( = 3E+8m/s / 633E-9m. f = 4.74E+14 Hz. b) E = hf = 6.63E-34Jsec(4.74E+14s-1) ................
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