How long have advances in astronomy been occurring? Only for the past few years
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1 mol of photons contained a number of photons equal to Avogadro number:
The total energy of the mole of photons is
, so the energy of a single photon is the total energy divided by the number of photons:
The energy of a single photon is related to its frequency f:
where h is the Planck constant. From this formula, we find the frequency of the photons in the problem:
And from the frequency we can finally calculate the wavelength
, using the relationship between wavelength, frequency and speed of light (c) for photons:
The total energy of the mole of photons is
The energy of a single photon is related to its frequency f:
where h is the Planck constant. From this formula, we find the frequency of the photons in the problem:
And from the frequency we can finally calculate the wavelength