Why Does Adding a Third Polarizing Filter Let Light Pass Through?

  • Context: Undergrad 
  • Thread starter Thread starter James Jackson
  • Start date Start date
Click For Summary
SUMMARY

The discussion centers on the intriguing phenomenon of light behavior when using polarizing filters, specifically how adding a third filter at 45 degrees allows light to pass through two filters oriented at 90 degrees to each other. This counterintuitive result is explained through quantum mechanics and the mathematics of polarization. Participants also share personal "wow" moments in physics, including unexpected behaviors in photoemission processes and the effects of intense laser light on photocathodes, leading to two-photon photoemission. The conversation highlights the complexities and surprises inherent in understanding light and quantum phenomena.

PREREQUISITES
  • Understanding of quantum mechanics principles
  • Familiarity with polarizing filters and their properties
  • Basic knowledge of photoemission and work function concepts
  • Experience with laser physics and photon interactions
NEXT STEPS
  • Explore the mathematics of polarization and light behavior with multiple filters
  • Investigate two-photon photoemission and its applications in quantum optics
  • Study the principles of interference patterns in double-slit experiments
  • Learn about the implications of quantum mechanics on classical physics phenomena
USEFUL FOR

Physics students, optical engineers, and anyone interested in the principles of light behavior and quantum mechanics.

  • #31
James Jackson said:
ZapperZ - No no, you can put the 45 degree polarizer on top of the other two. Try it...
I agree with DarkEternal
I had to put the 45 in-between no matter how close.
Let us know what you see on a retest, JJ.

Although, I'd credit the standard test as Zz described it as worthy of a WOW considering it still works even if only one photon at a time is sent through. Classical can’t explain that; and QM only has formulas to predict it on average, but not explain the individual actions.
 
Science news on Phys.org
  • #32
A first wow for me was the single slit diffraction pattern and how it was explained.
 

Similar threads

Polarizing Filters Fraction of Light Passing Through
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Birefringence and Automotive Window Tinting
  • · Replies 9 ·
Replies
9
Views
8K