Boosting Light Energy: Increasing Amplitude Without Changing Frequency

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    Amplification Light
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Discussion Overview

The discussion revolves around the concept of increasing the energy of light by manipulating its amplitude without altering its frequency. Participants explore the relationship between photon energy, amplitude, and the implications of constructive interference in light. The scope includes theoretical considerations and some experimental references.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants assert that light with higher frequencies corresponds to higher energy photons, questioning whether amplitude can be increased without changing frequency.
  • One participant suggests that amplitude may be increased through constructive interference of photons traveling in phase, although they express uncertainty about whether light behaves like classical waves in this context.
  • Another participant clarifies that amplitude is not a property of individual photons but relates to the number of photons present, indicating that increased intensity results from more photons rather than increased amplitude.
  • There is a discussion about the interest in high-energy single photons versus many lower-energy photons, with one participant proposing that bombarding a surface with photons could raise its temperature, potentially leading to higher energy photons through thermal processes.
  • A participant critiques the original question as a poorly designed homework prompt intended to provoke independent thought.
  • One participant introduces the concept of frequency doubling or second-harmonic generation as a method to achieve higher frequencies, providing details about the process and materials involved.
  • Another participant mentions stimulated emission and lasers as a means of light amplification without changing frequency.

Areas of Agreement / Disagreement

Participants express differing views on the nature of amplitude in relation to photon energy, with no consensus reached on whether amplitude can be increased independently of frequency. The discussion includes both theoretical exploration and practical examples, indicating a range of perspectives on the topic.

Contextual Notes

Some assumptions about the nature of light and its behavior in terms of amplitude and frequency remain unresolved. The discussion also touches on the limitations of classical wave analogies in describing light phenomena.

big prairie
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-Light with higher frequencies has higher energy photons.

Can the energy in light be increased by increased amplitude without increasing frequency?

How can amplitude be increased without increasing frequency?

- By photons traveling in phasae creating a constructive interpherence?
 
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Light isn't really a wave in that sense - the wave picture is just an anology.

Think of a police car going past with a flashing light. If you drew a graph of brightness against position it would have a wavelength and a frequency but it it isn't a wave.

The energy of an individual photon is set only be the wavelength or freqeuncy. The brightness or intensity is set by the number of photons.
 
big prairie said:
-Light with higher frequencies has higher energy photons.

Can the energy in light be increased by increased amplitude without increasing frequency?

How can amplitude be increased without increasing frequency?

- By photons traveling in phasae creating a constructive interpherence?

I'm trying to find out the answer myself. I don't think light can do constructive interferance like normal wave. It's like double intensity instead of double amplitude.
 
As was said, amplitude is not a changeable aspect of an individual photon rather it is with respect to the amount of photons. Think of it this way... amplitude is only increased by increasing the actual amount of photons.
 
Yes, but in some perspective, we interest in high energy single photon and not many photons of lower energy. But like you say, it can't... or we just don't know how. However, if we keep bombarting a surface with same energy photon, we will get a higher and higher temperature (ignoring heat lost). Am I right? If that's the case, we can make higher energy photon using that tempeature?
 
This is obviously a homework question of the type to "make students think for themselves", that fails miserably.
 
This may be of some interest to you...

"One of the most commonly-used frequency-mixing processes is frequency doubling or second-harmonic generation. With this technique, the 1064-nm output from Nd:YAG lasers or the 800-nm output from Ti:sapphire lasers can be converted to visible light, with wavelengths of 532 nm (green) or 400 nm (violet), respectively.

Practically, frequency-doubling is carried out by placing a special crystal in a laser beam under a well-chosen angle. Commonly-used crystals are BBO (β-barium borate), KDP (potassium dihydrogen phosphate), KTP (potassium titanyl phosphate), and lithium niobate. These crystals have the necessary properties of being strongly birefringent (necessary to obtain phase matching, see below), having a specific crystal symmetry and of course being transparent for and resistant against the high-intensity laser light. However, organic polymeric materials are set to take over from crystals as they are cheaper to make, have lower drive voltages and superior performance."

From: http://en.wikipedia.org/wiki/Nonlinear_optics
 
I believe that the attached immage is showing light refracting to cause constructive interference.
 

Attachments

You might look up stimulated emission, and lasers, to find out about Light Amplification. It's possible, and frequency is not changed.
 

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