Wave optics / Snell's law of refraction

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SUMMARY

When light transitions from a rarer medium to a denser medium, it undergoes refraction, resulting in a decrease in both wavelength and speed of propagation, while maintaining a constant frequency. This phenomenon is governed by the relationship described by the equation [v1/λ1 = v2/λ2], where v represents wave speed and λ represents wavelength. The frequency of light remains unchanged because altering it would require the oscillating medium to adjust its frequency, which is not feasible. This principle ensures continuity at the interface between the two media.

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  • Understanding of wave optics principles
  • Familiarity with Snell's Law of refraction
  • Basic knowledge of light propagation and frequency
  • Concept of continuity at media interfaces
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Taseng Mancheykhun
When light from a rarer medium enters a denser medium, the wave gets refracted into the denser medium and so the wavelenght and the speed of propagation decreases ( [v][1] >[SUBv][/SUB2]) but the frequency remains the same. HOW ?

[SUBv][/SUB1] / [SUBλ][/SUB1] = [SUBv][/SUB2] / [SUBλ][/SUB2] How?
 
Science news on Phys.org
The frequency cannot change. Ask yourself how it could. The field ( or the string or air molecule) would have to magically oscillate at a different frequency. The changing wave speed can only result in a wavelength change for ‘continuity’ at the interface.
 

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