Working on a physics problem, not sure if professor made a typo:

It says, a Blackbody 4.0cm on a side radiates heat at 540 W. At what wavelength, in um, does its emission spectrum peak?

should that watts be Kelvin? I think its a typo?

Question

Working on a physics problem, not sure if professor made a typo:

It says, a Blackbody 4.0cm on a side radiates heat at 540 W. At what wavelength, in um, does its emission spectrum peak? 

should that watts be Kelvin? I think its a typo?

anonymous · Answer

"radiates heat at..."
=> "radiates energy at..."  
which is the rate of energy transmission, w.r.t time off course and yes energy/time is power (=Watt).

no it's not a typo.