Table of Contents
Advertisement
4180, 4181
Technical Guide
Equation 3: Stefan-Boltzmann Law
The relationship between Planck's Law and Wien's Displacement Law is shown in Figure 1. Notice that
the energy peak for the Sun is about 0.5 μ m (500 nm), while at room temperature, 23 °C, it is just
below 10 μ m.
1.E+08
1.E+07
1.E+06
1.E+05
1.E+04
1.E+03
1.E+02
1.E+01
1.E+00
1.E-01
1.E-02
0
Figure 1. Relation between Planck's Law and Wien's Displacement Law
12
σT
M
=
Spectral Radiance and Temperature
1
2
3
4
5
6
7
∞
4
π L λ T
(
,
) λ d
=
0
8
9
10 11 12 13 14 15 16 17 18 19 20
Wavelength ( m)
Sun
1000°C
500°C
100°C
23°C
-50°C
Peak
Advertisement
Table of Contents
