Difference between revisions of "Bouncing Laser"
From UO Physics Demonstration Catalog
(Created page with "{{NewDemo|subject=Light and Optics|topic=Refraction and Dispersion|file1=bouncing_laser.jpg}} A 1:1 solution of Karo syrup and water is left to sit overnight. The syrup slowly sinks to the bottom and a varying level of index of refraction results. About 2 inches of syrup on the bottom looks good for this demo. A laser is shined into one end of the plexiglass tank, and it is seen to bend because of the varying index of refraction from the bottom to the top layer. When th...") |
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{{NewDemo|subject=Light and Optics|topic=Refraction and Dispersion|file1=bouncing_laser.jpg}} | {{NewDemo|subject=Light and Optics|topic=Refraction and Dispersion|file1=bouncing_laser.jpg}} | ||
A 1:1 solution of Karo syrup and water is left to sit overnight | This demonstration is difficult to set up, and ample time should be allowed for it to be set up properly. This requires at least a day in advance so that the water and syrup can sit overnight. | ||
A 1:1 solution of Karo syrup and water is left to sit overnight to make a gradient of syrup and water solution . Start with About 2 inches of syrup on the bottom./ Add water that has had the air bubbles taken out by boiling and the let cool down, or put water in a vacuum chamber to get the air bubbles out. Pour the water on top of the syrup in the narrow tank. Carefully and gently stir the syrup and water with an upward motion to get syrup to come up into the water and then resettle DO NOT OVER-STIR! Let sit for a few hours or overnight | |||
A bright laser is shined into one end of the plexiglass tank, and it is seen to bend because of the varying index of refraction from the bottom to the top layer. When the beam hits the bottom of the tank, it encounters total internal reflections and reflects back up, then curves down again, making it appear that the beam is bouncing. | |||
'''Location: | '''Location: | ||
''' | ''' | ||
* Laser: Shelf M-2 | * Laser: Shelf M-2 | ||
* Tank: Shelf M-1 | * Tank: Shelf M-1 | ||
*Kari Syrup: Under Fume Hood | |||
Revision as of 09:54, 21 January 2023
Return to Refraction and Dispersion
Description:
This demonstration is difficult to set up, and ample time should be allowed for it to be set up properly. This requires at least a day in advance so that the water and syrup can sit overnight.
A 1:1 solution of Karo syrup and water is left to sit overnight to make a gradient of syrup and water solution . Start with About 2 inches of syrup on the bottom./ Add water that has had the air bubbles taken out by boiling and the let cool down, or put water in a vacuum chamber to get the air bubbles out. Pour the water on top of the syrup in the narrow tank. Carefully and gently stir the syrup and water with an upward motion to get syrup to come up into the water and then resettle DO NOT OVER-STIR! Let sit for a few hours or overnight
A bright laser is shined into one end of the plexiglass tank, and it is seen to bend because of the varying index of refraction from the bottom to the top layer. When the beam hits the bottom of the tank, it encounters total internal reflections and reflects back up, then curves down again, making it appear that the beam is bouncing.
Location:
- Laser: Shelf M-2
- Tank: Shelf M-1
- Kari Syrup: Under Fume Hood
