Does frequency of light increase if

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Discussion Overview

The discussion revolves around the question of whether the frequency of light increases when a large area of light of a given frequency is focused into a smaller area. It explores concepts related to wave superposition, the implications of energy-mass equivalence, and the potential for designing devices that could manipulate light and matter.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant proposes that focusing a large area of light into a small area could theoretically increase the frequency of light, linking this to mass via E=MC² and E=hν.
  • Another participant asserts that the superposition of waves with frequency f does not change the frequency, suggesting that the frequency remains constant regardless of the area of focus.
  • A later reply questions whether colliding light at a focal point would lead to an increase in frequency, reiterating the linearity of Maxwell's equations as a counterpoint.
  • There is a challenge regarding the behavior of super-massive amounts of photons during collisions, indicating a need for further exploration of this phenomenon.

Areas of Agreement / Disagreement

Participants express differing views on whether the frequency of light can increase when focused or collided. Some assert that it cannot, while others explore the implications of such a scenario, indicating that the discussion remains unresolved.

Contextual Notes

The discussion involves assumptions about the behavior of light and the implications of wave theory, as well as the relationship between energy, frequency, and mass. There are unresolved questions regarding the effects of photon collisions and the limitations of Maxwell's equations in this context.

OuterGalactic
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If you were to focus an extremely large area of light of a given frequency into a small area of empty space say from 300,000,000m X 300,000,000m into 1m^2...would you get an increase in frequency?

I understand that the waves may collide and possibly summate...

If the frequency of the light in the smaller area did increase..then given E=MC^2 and E=hν, (C^2 and Planck's constant each being unchanging, thus mass and frequency would be the variables) and if E=E in both equations, then MC^2=hv..., and subsequently M=hv/C^2...thus mass is directly proportionate to frequency...and since frequency can theoretically increase or decrease infinitely, increasing frequency increases mass.

So if the above is possible, it would then be feasible to tune a lens to a specific frequency...which would in turn allow for designing a device perfectly calibrated to take in solar light and emit specific forms of matter.
 
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Hi, OuterGalactic,

Welcome to PF!

The superposition of waves with frequency f is still a wave with frequency f.

-Ben
 
bcrowell said:
Hi, OuterGalactic,

Welcome to PF!

The superposition of waves with frequency f is still a wave with frequency f.

-Ben

Thanks for the welcome Ben

Do you think the frequency would increase if you collided light at a focal point?
 
OuterGalactic said:
Do you think the frequency would increase if you collided light at a focal point?

No. Maxwell's equations are linear.
 
bcrowell said:
No. Maxwell's equations are linear.

So what happens to super-massive amounts of photons when they collide?
 

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