How much power is radiated by the human body?

[maikeemi]

The power per unit area radiated by an ideal blackbody radiator is P/A = σT4, where P = power, A = surface area, the Stefan-Boltzmann constant is σ = 5.67 ×10−8 W m−2 K−4, and T = temperature (in the absolute kelvin scale).

How much power is radiated by the human body? Calculate the total power radiated by a blackbody cylinder of height 1.22 m and radius 0.15 m at human body temperature. (Ignore radiation from the ends of the cylinder.) (The result is considerably more than the power radiated by a human body, because skin is not a good radiator in the infrared.)

 

[marcusl]

Please show your attempted solution, per the Forum rules.

 

[Redbelly98]

Welcome to PF.

Is this homework? If so, you need to show your own attempt at solving it before getting hints and help, according to our forum policies. For details see the section on "Homework Help" here:
https://www.physicsforums.com/showthread.php?t=5374

Also, in future please post homework questions here:
https://www.physicsforums.com/forumdisplay.php?f=152

Regards,

Mark