Purpose:Show a spectrum from a small bright source.
Description:Use the large reflection grating to obtain beautiful spectra from small bright sources. In the photograph at the left above the grating is being held in the beam, creating three orders of reflections. The zero order is a direct reflection (white) at the right of the photograph, while the second order spectrum can be seen to the left of the picture. The first order spectrum (center of picture) is washed out due to overexposure.