Calculating the energy of a photon.
The first part of the problem asked me to find the lambda max of a blackbody at 2.7K.
"The cosmic background radiation is that of ablack body at 2.7 K.What is the value λmax at which the distribution has a maximum?"
I found it to be 1.07mm. It then asked me to find the energy in eV of the corresponding photon. How do I do this?