Balmer Series and prism spectrometer

The atoms of a specific chemical element can only emit light in very characteristic spectral lines. By means of a prism or a diffraction grating a line spectrum of the emitted light can be produced.
In this experiment a precise prism spectrometer is used. You will learn about minimum of deflection and you have to get used to read off the vernier. The observation of the bright spectral lines is very impressive!
First you have to measure the six lines of the helium spectrum. With further data you can draw the graph of the colour dispersion of the used prism. With this calibrated graph you finally determine the wavelengths of the Balmer series of hydrogen.

Öffnet internen Link im gleichen FensterApplication