
#1
Oct407, 10:37 PM

P: 569

1. The problem statement, all variables and given/known data
The Cosmic microwave background radiation fits the Planck equations for a blackbody at 2.7 K. a) What is the wavelength at the maximum intensity of the spectrum of the background radiation ? b) What is the frequency of the radiation at the maximum? c) what is the total power incident on Earth from the background radiation 2. Relevant equations lambda(max)*T=2.898*10^3 m*K T=2.7 K f=c/lambda(max) sigma=5.6703e8 W/m^2*K^4 R=sigma*T^4 or 3. The attempt at a solution a) lambda(max)= 2.898*10^3 m*K/(2.7 K)=1.0733*10^3 m b)f=c/lambda=(3e8 m/s)/(1.0733*10^3 m)= 2.795 *10^11 /s c)R =sigma*T^4= (5.6703e8 W/m^2*K^4)((2.7 K)^4=3.013e6 



#2
Oct407, 11:16 PM

HW Helper
P: 1,664





#3
Oct407, 11:34 PM

P: 569





#4
Oct407, 11:48 PM

HW Helper
P: 1,664

Blackbody radiation problem 



#5
Oct507, 07:24 AM

P: 569





#6
Oct507, 09:02 AM

HW Helper
P: 1,664




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