The discussion revolves around determining the temperature of a black body that emits photons at a frequency of 4 GHz, with a given photon energy. Participants explore the relationship between frequency, wavelength, and temperature in the context of black body radiation.
Several participants are actively engaging with the problem, offering guidance on relevant equations and questioning the original poster's setup. There is a recognition of potential confusion regarding the application of black body radiation principles, but no consensus has been reached on the correct approach to find the temperature.
There is a mention of the original poster's uncertainty about the problem's formulation and whether it is part of an online homework assignment. The discussion also touches on the implications of the frequency being in the microwave range, which may challenge typical black body radiation assumptions.
NascentOxygen said:
sphys4 said:
NascentOxygen said:Are you sure you have represented the question correctly? Because a hot body emits photons over a whole spectrum of energies.
And I presume you didn't intend to write "protons"? Otherwise, I'm outta here.
ehild said:
sphys4 said:
NascentOxygen said:0.075m seems correct. So at 4GHz we are talking about microwave energy, way below visible light. (I wonder is this venturing beyond the limits of black body radiation equations?)
To find T you need to divide b by lambda.
Considering that the lowest temperature found in outer space is about 3 Kelvin, then I think you've taken us to another universe.
At least it's not a negative Kelvin.
Did you invent this question, or it is out of a book?