Classroom experiments and activities

How to build a spectroscope


 Considering that - in order to measure the mass of a galaxy, or to study many properties of stars and for many many applications - Astronomers analyse the spectra of light emitted by the gases involved, here you can find some activities about spectroscopy. 


How to build a very simple spectroscope, using everyday materials (the inner part of a toilet paper roll, and small peices of a broken old CD ); this simple instrument can be used to analyse the differences in spectra from various light sources.

Here you find instructions:  pdf how_to_build_spectroscope

And here are some simple experiments that students can carry out in order to study diffraction gratings behaviours and to measure the wavelength coresponding to certain colours of visible light, to observe a gas spectra etc. ... pdf diffraction_exercises_sup