radiative laws

Question

all bodies that are above absolute zero radiate energy. Wien's law describes the peak wavelength at which that body emits. the equation for Wiens law is the following: ?max = b/T.

T in this equation is temperature in units of Kelvin (K) while b represents a constant that is found to be 2898 µ*K. The units of ? are microns (µ). Using that equation, find the peak wavelength of the following bodies. Kelvin temperatures have been provided.

 

Deneb Algedi (7301K)

Yourself (310 K)

Answer 1

λ_max = b / T

 

b = 2898 μ * K

 

At 7301 K,

 

λ_max = (2898 μ * K) / (7301 K) = 0.3969 μ

 

At 310 K,

 

λ_max = (2898 μ * K) / (310 K) = 9.3484 μ