Difference between revisions of "Poisson Spot"

From UO Physics Demonstration Catalog

(Created page with "{{NewDemo|subject=Light and Optics|topic=Diffraction and Interference|file1=Poisson Spot.gif}} A laser beam with a beam expander attatchment is aimed at the ball bearing which is held by the lens apparatus. The interference pattern, which is now large enough to see clearly, is projected onto a screen or wall. The bright spot at the center of the pattern, Poisson's spot, is the result of light waves being bent around the ball bearing. '''Location: ''' * Laser: Shelf M-2...")
 
 
Line 2: Line 2:


A laser beam with a beam expander attatchment is aimed at the ball bearing which is held by the lens apparatus. The interference pattern, which is now large enough to see clearly, is projected onto a screen or wall. The bright spot at the center of the pattern, Poisson's spot, is the result of light waves being bent around the ball bearing.
A laser beam with a beam expander attatchment is aimed at the ball bearing which is held by the lens apparatus. The interference pattern, which is now large enough to see clearly, is projected onto a screen or wall. The bright spot at the center of the pattern, Poisson's spot, is the result of light waves being bent around the ball bearing.
A video camera will be required to show the spot in a classroom


'''Location:
'''Location:
'''
'''
* Laser: Shelf M-2
* Laser: Shelf M-2
* Laser Attatchments: Shelf M-4
* Lens/Ball Bearing Holder: Shelf M-3
* Lens/Ball Bearing Holder: Shelf M-3
* Ball Bearings: Shelf M-3

Latest revision as of 10:33, 21 January 2023

Return to Diffraction and Interference

Poisson Spot.gif

Description:

A laser beam with a beam expander attatchment is aimed at the ball bearing which is held by the lens apparatus. The interference pattern, which is now large enough to see clearly, is projected onto a screen or wall. The bright spot at the center of the pattern, Poisson's spot, is the result of light waves being bent around the ball bearing.

A video camera will be required to show the spot in a classroom

Location:

  • Laser: Shelf M-2
  • Lens/Ball Bearing Holder: Shelf M-3