If you pour a solution containing a sulphur salt into acid, within 10 minutes the sulphur crystals increase progressively. When their dimension becomes comparable to the light’s wavelength, light diffusion takes place. According to Rayleigh’s explanation, the blue component is deflected much more effectively than the red one, which goes on undisturbed.
Thus it is possible to simulate the phenomenon which causes the colour of the sky to turn blue and the reddish colour of the Sun and the Moon when they are on the horizon. With the polarizing filter it is also possible to study the polarization of the diffused light.
The optic projector must be bought separately.
- 1 x Basin
- 1 x Dropper
- 1 x Polarizing filter
- 1 x Glass stirrer
- 1 x Half-transparent screen