Does dispersion of light occur in reflection?

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SUMMARY

Dispersion of light does not occur during reflection or total internal reflection, as confirmed by the discussion. The index of refraction, which varies with wavelength, is responsible for dispersion during refraction but does not influence reflection angles. An exception arises at the critical angle, where light can exhibit different spectra for various wavelengths, although true dispersion does not occur. This understanding is crucial for optics and light behavior analysis.

PREREQUISITES
  • Understanding of light behavior and properties
  • Knowledge of refraction and reflection principles
  • Familiarity with critical angle concepts
  • Basic grasp of wavelength and index of refraction
NEXT STEPS
  • Research the principles of total internal reflection in optics
  • Explore the relationship between wavelength and index of refraction
  • Study the effects of critical angle on light transmission
  • Investigate practical applications of dispersion in optical devices
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Students and professionals in physics, optical engineers, and anyone interested in the principles of light behavior and its applications in technology.

rishch
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During refraction the different colors that white light is composed of are dispersed but does this happen during reflection or total internal reflection?
 
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Dispersion happens because index of refraction depends on wavelength. Since reflection angle doesn't depend on refraction index, there is no dispersion.

The only exception is if you are right there at the critical angle. You can have a situation where the particular angle is just under critical for some wavelengths and just over for others. You still won't get actual dispersal, but now the transmitted and reflected light can have different spectra.
 
Thanks :)
 

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