Polarizers and Analyzers in optics

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SUMMARY

The discussion focuses on the interaction between polarizers and analyzers in optics, specifically utilizing Malus's Law to determine light intensity. When light passes through a polarizer, the intensity is reduced to (1/2)I0. Following this, if the angle ∅ between the polarizer and analyzer is zero, the intensity remains (1/2)I0, indicating no additional reduction in intensity under ideal conditions. However, this assumes perfect transparency, which may not hold true in practical scenarios.

PREREQUISITES
  • Understanding of Malus's Law in optics
  • Familiarity with the concept of light polarization
  • Basic knowledge of trigonometric functions
  • Awareness of ideal vs. real-world optical components
NEXT STEPS
  • Research the implications of non-ideal polarizers and analyzers
  • Explore advanced applications of Malus's Law in optical systems
  • Learn about the effects of different materials on light polarization
  • Investigate the role of angle adjustments in optical experiments
USEFUL FOR

Optics students, physicists, and engineers working with light manipulation and polarization techniques.

Ian Baughman
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If we have a polarizer and an analyzer where the angle between the two axes is ∅ then we can find the intensity using Malus's Law.

The intensity after the polarizer would be:
(1/2)I0​

After the Analyzer we could have an intensity of:
(1/2)I0cos2(∅)​

What would happen though if ∅ = 0. Would the analyzer have any effect on the light intensity?
 
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In theory, no it would not. But that assumes ideal 100% transparency.
 

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