Question

"the temperature of a student's skin is 33.0°c. at what wavelength does the radiation emitted from the skin reach its peak?"

Answer 1

The general expression relation wavelength and temperature:

Wavelength (m) * Temperature (K) = Constant = 2.898*10^-3
Where Temperature = 33.0°C = (33+273.15) K = 306.15 K

Therefore;
Wavelength = (2.898*10^-3)/306.15 = 9.466*10^-6 m = 0.009466 mm