Photograph of spectrometer

Apparatus:
various light sources ( e.g. Krypton, Helium, Mercury, Sodium), spectrometers. Light sources are stored in the optics lab.

Description:
Look at the light source through the spectrometer, ensuring that the slit on the right side of the screen is fully illuminated. The characteristic emission spectrum is visible on the screen.

PIRA 7B10.17