https://physlab-wiki.com/ 2026-04-18T17:44:45+00:00 https://physlab-wiki.com/ https://physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2021-11-05T17:43:25+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/modern_physics/atomic_physics/absorption_spectrum_of_didymium_glass?rev=1636148605&do=diff Absorption Spectrum of Didymium Glass A slide projector with slit mask is used to project a narrow band of white light through a didymium eyeglass lens and a diffraction grating. The resulting absorption spectrum is visible on a wall or projection screen. text/html 2021-11-05T17:44:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/modern_physics/atomic_physics/crookes_tube?rev=1636148684&do=diff Crookes Tube An induction coil is used to produce a high-voltage discharge in a Crookes tube. A fluorescent screen permits the observation of the electron beam. A magnet may be used to deflect the beam. This apparatus produces x-rays and UV radiation. text/html 2021-11-05T17:45:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/modern_physics/atomic_physics/emission_spectra_lamps?rev=1636148728&do=diff Emission Spectra Lamps Four fluorescent lamps containing different gases exhibit characteristic emission line spectra. Small transmission gratings which allow the various lines to be resolved are available to pass out to the class. L0, L1 PIRA DCS 7B10.10 text/html 2021-11-05T17:46:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/modern_physics/atomic_physics/he-ne_laser?rev=1636148768&do=diff He-Ne Laser An open helium-neon laser may be used as a visual aid to discuss both the properties of laser light and how lasers work. L0 PIRA DCS 9B62.10