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 | ||
* Lens/Ball Bearing Holder: Shelf M-3 | * Lens/Ball Bearing Holder: Shelf M-3 | ||
Latest revision as of 11:33, 21 January 2023
Return to Diffraction and Interference
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
