Refraction : freq remains unchanged

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Discussion Overview

The discussion revolves around the phenomenon of refraction, specifically addressing why the frequency of light remains unchanged when it enters a different medium, while its velocity and wavelength change. The scope includes conceptual understanding and implications for different types of waves, such as sound and electromagnetic waves.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants assert that the frequency of light remains unchanged during refraction because it is determined by the source of the light, as explained by the vibration of electrons or atomic transitions.
  • Others elaborate that while the frequency remains constant, the wavelength decreases when light enters a new medium, which is a characteristic shared by both electromagnetic waves and sound waves.
  • One participant expresses satisfaction with the answers provided and seeks information on forums for other subjects, indicating a broader interest beyond physics.

Areas of Agreement / Disagreement

Participants generally agree on the principle that frequency remains unchanged during refraction, but there is no explicit consensus on whether this principle applies universally to all types of waves, such as sound.

Contextual Notes

The discussion does not delve into the mathematical derivations or assumptions underlying the claims about frequency, wavelength, and velocity, leaving some aspects unresolved.

Who May Find This Useful

Individuals interested in the principles of wave behavior, particularly in the context of refraction, as well as those exploring related topics in physics and other scientific disciplines.

momentum
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this is my first post in this forum.
i have a question :
i have read that when light refracts into other medium its frequency remains unchanged but velocity and wavelength changes.

there is a formula to it : v=n*lamda (v=velocity,n=freq,lambda=wavelength)

Q1: why the freq remains unchanged ?

Q2: is it true for all waves (like sound, etc ) ?


thank you
 
Last edited:
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YES.The frequency is determined by the source.By the vibration of those electrons,or by the specific transition which occurs inside the atom.

Daniel.
 
i am so glad that my question has been answered so fast. i have understood your answer. this is a great forum.

i have some questions on social science, geography . will you please tell me some forum links where i could post questions on these topics. is there any forum like this which supports questions on social sc, geography,economis ?
 
Yes, the frequency means the cycles/sec , which as daniel said is determined by the source but the wavelength is the distance between two consecutive troughs/crests , when a light ray enters into the medium this length between crests/trough decreasses but the frequency remains the same. This happenes with all the electromagnetic waves and sound waves.
 
Yes, the frequency means the cycles/sec , which as daniel said is determined by the source but the wavelength is the distance between two consecutive troughs/crests , when a light ray enters into the medium this length between crests/trough decreasses but the frequency remains the same. This happenes with all the electromagnetic waves and sound waves.

thanks doctor. that's very beautiful .
 
You can ask all your questions here.In this forum for "genetal physics" and in other specialized forums for other subjects.

Welcome ot PF !


Daniel.
 

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