Technical data

Diffraction at circular obstacles and circular apertures -Poisson spot

Article no: P1412201

Principle

If circular apertures are illuminated with coherent light, concentric bright and dark circles alternate behind them due to diffraction and interference. The intensity of the interference maxima decreases rapidly with increasing distance from the center.If the circular apertures are exchanged for circular apertures, similar interference patterns appear. Brightness is always observed at any location on the center axis of the geometric shadow area.

Benefits

Curriculum-relevant DEMO Experiment in optics
Equivalence to the corresponding student experiment
Stable optical bench
Compact, simple construction

Tasks

Diffraction at circular apertures and circular apertures - Poisson's spot

Scope of delivery

Optical profile-bench, l = 1000 mm	08370-00	1
Slide mount for optical bench	09822-00	3
Mount with scale on slide mount	09823-00	1
Plate mount for three objects	09830-00	1
Screen, with diffracting elements	08577-02	1
Screen, metal, 300 x 300 mm	08062-00	1
Barrel base expert	02004-00	1
Vernier calliper stainless steel 0-157mm, 1/20	03010-00	1
Measuring tape, l = 2 m	09936-00	1
Diodelaser, red, 1 mW, 635 nm	08771-99	1