Dinglo Blackbody Spectrum Simulator

Interactive thermal radiation laboratory

Physics · Thermal Radiation

Spectral Radiance

Explore how the intensity and peak wavelength of an ideal blackbody change with temperature.

Planck distribution · wavelength scale: 100–3000 nm
Blackbody spectrum
Visible region
Wien peak
Peak wavelength
501.5 nm
Wien's displacement law
Frequency at peak λ
5.98 × 10¹⁴ Hz
Calculated from c / λmax
Total emitted power
6.32 × 10⁷ W/m²
Stefan–Boltzmann law, ideal surface
Peak region
Visible
Electromagnetic region containing λmax

What this simulator demonstrates

A blackbody is an ideal object that absorbs all incident electromagnetic radiation and emits a continuous spectrum determined only by its temperature. Increasing temperature raises the emitted intensity dramatically and shifts the peak toward shorter wavelengths.

B(λ,T) = (2hc² / λ⁵) · 1 / (e^(hc/λkT) − 1)

Visible-spectrum reference

At 5778 K, the blackbody peak lies near the visible region.