Principle

The experiment can be carried out in daylight because the
diffraction pattern from a red LED can clearly be seen. However,
the arrangement should not face into the light. It must be ensured
that as far as possible only one Koppelmann pattern is always
viewed with the eye.

Benefits


Specified for the requirements of the german final secondary-school examinations

Especially for secondary schools

Quantum and wave optics in a student experiment



Tasks

What can be learned from diffraction patterns? You are already
familiar with the interference at a grating. This knowledge can be
used to investigate and analyse structures of microscopic
dimensions. In this experiment you will learn to draw conclusions
about structures from their interference patterns.