Arago's (Poisson) Spot

Identifier: L: W - 023
Arago/Poisson Spot using Red Laser

 

Setup for Poisson Spot from Back

 

Setup for Poisson Spot from Front

Concept Overview:

Fresnel Diffraction

Lecturer Instructions

Steps to Follow

  1. Turn on laser
  2. Observe pattern (adjust horizontal distance as needed)

Expected Result

A small point of light will be visible within the dark center of the shadow.

Transcript:

There is no audio for this recording.