Young's Modulus Experiment With a Glass Screen

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SUMMARY

The discussion focuses on the Young's Modulus experiment involving a glass screen and its impact on the interference pattern observed. It establishes that the phase difference between wave sources S1 and S2 changes due to the longer path taken by light through the glass compared to air. This alteration results in a shift of the fringe pattern, specifically towards point Y, as the wavelengths of light differ when passing through glass versus air.

PREREQUISITES
  • Understanding of wave interference principles
  • Familiarity with Young's Modulus and its applications
  • Knowledge of phase difference in wave mechanics
  • Basic concepts of light propagation through different media
NEXT STEPS
  • Study the mathematical derivation of phase differences in wave interference
  • Explore the properties of light in different media, focusing on refractive indices
  • Investigate the experimental setup for measuring Young's Modulus using optical methods
  • Learn about fringe patterns and their significance in wave optics
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Students and educators in physics, particularly those studying wave mechanics and material properties, as well as researchers interested in optical experiments related to Young's Modulus.

Jeremy Feng
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Homework Statement


upload_2018-10-6_15-40-46.png


Homework Equations



Path difference is nλ at maxima, (n+0.5)λ at minima

The Attempt at a Solution



I think the phase difference between S1 and S2 is not 0 anymore, because the wave effectively takes a longer distance by going through S2. Thus, there is no longer a central maxima at O.

This means the whole fringe pattern shifts, however why is it towards Y?
 

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Consider the number of wavelengths of the light as it passes thru the glass
as compared to the number of wavelengths of light as it passes thru
an equivalent thickness of air.
 

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