A light emitting diode produces blue light at a wavelength of
469.8 nm. The electric field in this diode must be oscillating at a
frequency of:
_______ Hz
frequency f =speed /wavelength
speed of light =3x108 m/s
wavelength L= 469.8x10-9 m
so frequency f =3x108 /(469.8x10-9 ) = 6.38x1014 Hz
A light emitting diode produces blue light at a wavelength of 469.8 nm. The electric field...
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