Principle

Once it has been recognised in lessons that light can be
reflected and refracted just like water waves, the question poses
itself of whether light has wave character. If it does, then it
must be possible to demonstrate interference phenomena as with
water waves.
 
This experiment on diffraction at an optical grating provides a
convincing proof of the interference properties of (visible) light
and hence of its wave character.

Benefits


Multifunctional light box - All-in-one: Can be used for geometric optics on the table, colour mixing and on an optical bench

Extension with others sets at anytime, no additional light sources needed, recognition value for students



Tasks

Investigate the phenomena occurring when a light beam passes
through an optical grating.