Blackbody Radiation and Bose-Einstein Statistics

Control console

Set the cavity temperature and scan the monochromator, recording the detector signal at each wavelength.

Cavity temperature

Wavelength

µm

Narrow slitOFF

Cuts the bandwidth by a factor of four but also the signal, so the run takes longer.

pwrmeasfault

Set the cavity temperature and step the wavelength across the whole range, more finely near the peak.
Subtract the dark signal and divide by the detector responsivity given on the apparatus to obtain the spectral radiance.
Fit Planck's law with h and k as free parameters, holding c and the temperature fixed.
Overlay the Rayleigh-Jeans and Wien forms and state where each fails.
Repeat at three temperatures.

standby

No readings on this channel yet. Set the controls and press Read detector.

A fresh page. Take your first reading and it will be entered here.

Take at least one reading to plot.