Richard Clark wrote:


114 micro Kelvin certainly falls within the parameters of the question
offered. I dare say Cecil would have been silent on the specific
matter, irrespective of his recreational activity.

As for the specific difference between you and your daughter's
computation, I use the Wien Displacement Law. It, too, employs the
method you describe (albeit with Boltzmann's constant divided by
Planck's constant instead as it is frequency not wavelength
descriptive), and with an additional constant of multiplication
(2.8214). By this method, your 144 micro Kelvins represents 8.466 MHz
for the peak wavelength.

Richard,

To be a bit fussy, the temperature of a photon is not defined. Only a
distribution of photon energies can be defined with a temperature
(sometimes). Assuming a standard blackbody model, your answer is correct
of course.

Perhaps Cecil was trying to recall the formula for the temperature of a
single photon. He might be looking for a while.

73,
Gene
W4SZ