Interference & Polarisation Questions

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SUMMARY

This discussion addresses three key topics in optics: estimating coherence length using interference patterns, demonstrating the equivalence of circularly polarized light to two mutually perpendicular plane polarized lights with a phase difference of π/2, and calculating the number of fringes formed by a 2mm thick plane-parallel glass plate with a refractive index of 1.50 using monochromatic light of wavelength 6000 AU. The coherence of the source can be estimated based on the number of observable fringes, while the equivalence of polarizations can be shown using vector representations. The fringe formation calculation requires the application of interference equations specific to thin films.

PREREQUISITES
  • Understanding of interference patterns in optics
  • Knowledge of polarization types and their properties
  • Familiarity with thin film interference equations
  • Basic concepts of refractive index and its implications in optics
NEXT STEPS
  • Study the principles of coherence length in wave optics
  • Learn about the mathematical representation of polarization states
  • Research thin film interference and its applications in optical devices
  • Explore the derivation of fringe formation equations for plane-parallel plates
USEFUL FOR

Students and professionals in physics, particularly those specializing in optics, as well as researchers interested in wave phenomena and polarization effects.

Hrithik
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1.in an intrfrnce expmnt. wit monochromatic light of wavlngth 6000 AU only 50 fringes are observable.estimate d coherence of d source.

2.show a circularly polarised lght is eqvlnt to 2 mutually perpendicular plane polarised lt wit a phase diff of pie/2.

3.fringes of equal inclination are formed with a 2mm thck plnpll glass plate of n=1.50.how many fringes are formed entirely ? w=6000 AU
 
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any help on what eqs to use please
 

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