Light transmission through glass.

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Discussion Overview

The discussion centers on the transmission of light through glass, exploring the underlying principles of light behavior when transitioning between different media. Participants delve into concepts such as the dual nature of light, changes in wavelength and frequency, and the refractive index, while also seeking detailed explanations suitable for a university-level understanding.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that light exhibits dual nature, with changes in wavelength occurring when transitioning between media while frequency remains constant.
  • Others discuss the refractive index as a ratio of the speed of light in air to that in the medium, suggesting that this affects the velocity of light in glass.
  • A participant questions the visualization of constant frequency with varying wavelengths, seeking clarification on how this can be represented graphically.
  • Another participant introduces an analogy involving an oscillating mass-spring system to illustrate how wavelength can change with velocity while maintaining the same frequency.

Areas of Agreement / Disagreement

Participants express varying interpretations of the relationship between frequency and wavelength, with some providing analogies and examples while others seek further clarification. The discussion remains unresolved regarding the visualization and implications of these concepts.

Contextual Notes

Participants reference specific properties of light and its behavior in different media, but there are limitations in the assumptions made about the nature of light and the definitions of terms like frequency and wavelength. The discussion does not resolve these complexities.

Who May Find This Useful

Students and enthusiasts in physics, particularly those interested in optics and the behavior of light in different materials.

WoodenFrogs
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I was wondering if anyone on here could give me a detailed explanation on how light passes through glass. I'm a junior in physics at a university, so it's OK if the explanation is complex.
 
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light is having dual nature. when light travels from one medium to another medium wave length changes but no. of vibrations per sec i.e frequency remains constant. so velocity of light changes when light travels in glass or medium
refractive index[n]=C air/C medium
 
WoodenFrogs said:
I was wondering if anyone on here could give me a detailed explanation on how light passes through glass. I'm a junior in physics at a university, so it's OK if the explanation is complex.

You might want to start by reading our https://www.physicsforums.com/showthread.php?t=104715" in this sub-forum. The entry on how photons move through a material might provide a starting point in understanding the mechanism of light interaction in solids.

Zz.
 
Last edited by a moderator:
Vishal60 said:
light is having dual nature. when light travels from one medium to another medium wave length changes but no. of vibrations per sec i.e frequency remains constant. so velocity of light changes when light travels in glass or medium
refractive index[n]=C air/C medium

I'm trying to imagine how the frequency remains constant while wave length changes, if you draw two Sine waves with the same frequency, but with different wave length - how does it look like?
 
GT1 said:
I'm trying to imagine how the frequency remains constant while wave length changes, if you draw two Sine waves with the same frequency, but with different wave length - how does it look like?

You need a velocity component to this. Take an oscillating mass-spring system. Now move it laterally at a velocity v. Now do the same thing but move it at a slower velocity v'. The wavelength when it is moving with velocity v is going to be longer than when it is moving with velocity v'. Yet, in both cases, the frequency remains the same, since the the mass-spring system is oscillating at the same frequency.

Zz.
 

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