What is the energy of a photon of green light with a frequency of 5.90 ✕ 1014 s−1?


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Oct 3rd, 2015

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x = (6.626 x 10¯34 J s) (5.90 x 1014 s¯1)

x = 3.91x 10¯19 J

NOTE  : All frequencies of visible light will have an energy in the 10¯19 J range of values. If you wish to, you may calculate this for yourself. The wavelength range of visible light is taken to be from 400 nm to 700 nm. This translates (more-or-less) to a range from 5 x 10¯19 J down to 3 x 10¯19 J.

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Oct 3rd, 2015

Where did the 6.626 x 10^-34 come from?

Oct 3rd, 2015

 According to Planck's quantum theory, energy is always emitted in multiples of h.

E = hν  [h = 6.626 x 10-34 J.s]


Oct 3rd, 2015

E = nhν = (1)(6.626 x 10-34 J.s)(5.90 x 1014 s-1) =3.91 x 10 ^-19 J


Oct 3rd, 2015

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