Cheap fun with polarized light


by Chronos
Tags: cheap, light, polarized
Chronos
Chronos is offline
#1
Feb8-05, 12:30 AM
Sci Advisor
PF Gold
Chronos's Avatar
P: 9,182
Looking for ways to liven up your next quantum physics party? Shine a light through a polarized lens. Align and rotate a 2nd lens until the light intensity is reduced to 50%. Align and rotate a 3rd lens until the light intensity is reduced to 25%. Next ask your guests what will happen to the light intensity if you remove the 2nd lens. Have accomplice standing by with camcorder to record audience reaction when you remove the 2nd lens.
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser
Edgardo
Edgardo is offline
#2
Feb8-05, 06:23 AM
P: 685
Nice experiment. Where do you get such polarizer lenses (camera filters?) ?
A while ago I opened some cheap calculators and took the polarizers from the LCD.
Haven't tried your experiment though. Maybe I will show it to my brother and sister
and (hopefully) impress them


-Edgardo
ppnl2
ppnl2 is offline
#3
Feb8-05, 07:44 AM
P: 28
Quote Quote by Edgardo
Nice experiment. Where do you get such polarizer lenses (camera filters?) ?
A while ago I opened some cheap calculators and took the polarizers from the LCD.
Haven't tried your experiment though. Maybe I will show it to my brother and sister
and (hopefully) impress them


-Edgardo
Polarized sunglasses will probably do. If people think of them as just dark filers it will probably add to the effect.

DrChinese
DrChinese is online now
#4
Feb8-05, 10:20 AM
Sci Advisor
PF Gold
DrChinese's Avatar
P: 5,146

Cheap fun with polarized light


I bought 2 pairs of polarized clip-ons years ago for this exact experiment. Worked like a charm, and is a simple way to show the wave nature of light. A photo more or less demonstrates the particle nature of light, so that makes it easy to show the duality.
Chronos
Chronos is offline
#5
Feb8-05, 04:48 PM
Sci Advisor
PF Gold
Chronos's Avatar
P: 9,182
Quote Quote by Edgardo
Nice experiment. Where do you get such polarizer lenses (camera filters?) ?
A while ago I opened some cheap calculators and took the polarizers from the LCD.
Haven't tried your experiment though. Maybe I will show it to my brother and sister
and (hopefully) impress them


-Edgardo
http://www.anchoroptical.com/Products/Display.cfm?catid=267


Register to reply

Related Discussions
Circularly Polarized Light... General Physics 1
Polarized light Chemistry 1
polarized light Advanced Physics Homework 6
Polarized Light General Physics 2
Polarized Light General Physics 7