Constant Light without a source?

In summary: If you use a laser pointer, it will only emit light for a short amount of time, so you would need to turn it on and off quickly. Also, the mirrors will need to be very large and have a high reflective quality in order to create a constant light.
  • #1
Kazza
3
0
Constant Light without a source?

Is it possible to create a constant light using a laser pointer and two highly reflective parabolas. If the two parabolas open out to face each other, and then you shine the laser into one, would the laser reflect until it reaches the centre and then continualy bouncing back and forth creating a constant light, at this point turning the laser off cause there to be no light source. Eventually this would fade out but is it possilbe.
Any ideas on where to buy products for this would be usefull.
 
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  • #2


In theory, an idea such as this should be possible. However, in order for the light to be seen, it has to diffract off of the air, which obviously diminishes the beam strength. Also, since no mirror is perfect, even in a vacuum the beam would not continue to propagate infinitely.
 
  • #3


I don't expect this to be possible for visible light, or EM radiation of wavelength shorter than microwave. Anything you make the mirrors out of will be composed of atoms, and so the granularity will have a deteriorating/dispersive effect on multiple reflections. There can be a few, or even a few hundred reflections, but very soon the light will scatter out of the apparatus. Unfortunately, for much longer wavelengths you have another problem: heat loss.
 
  • #5


Andy Resnick said:
This sounds very similar to the principle of ring-down spectroscopy; the "residence time" of light in a cavity is a very sensitive measure of what is in the cavity.

http://en.wikipedia.org/wiki/Cavity_ring_down_spectroscopy

Wow, I didn't know there was such a thing. Thanks for opening my eyes.
Cheers
 
  • #6


Kazza said:
Is it possible to create a constant light using a laser pointer and two highly reflective parabolas. If the two parabolas open out to face each other, and then you shine the laser into one, would the laser reflect until it reaches the centre and then continualy bouncing back and forth creating a constant light, at this point turning the laser off cause there to be no light source. Eventually this would fade out but is it possilbe.
Any ideas on where to buy products for this would be usefull.

Keep in mind that the only light you see is light that has left the system of mirrors.
 

Related to Constant Light without a source?

What is constant light without a source?

Constant light without a source refers to the phenomenon of light that appears to be present continuously, even though there is no apparent source or origin for the light. This can occur due to natural phenomena, such as bioluminescent organisms, or through artificial means, such as light reflection or refraction.

How does constant light without a source occur?

Constant light without a source can occur through various mechanisms. One common cause is bioluminescence, which is the production and emission of light by living organisms. This can also be caused by the reflection or refraction of light, which can create the illusion of a constant light source even though there isn't one present.

Can constant light without a source be explained by science?

Yes, constant light without a source can be explained by science. As mentioned before, this phenomenon can occur through natural or artificial means and is well understood by scientists. Through research and experimentation, scientists have been able to explain the mechanisms behind constant light without a source.

Are there any potential dangers associated with constant light without a source?

In most cases, constant light without a source is harmless. However, if the light is produced by bioluminescent organisms, there is a possibility that they could contain toxins that could be harmful if ingested or if the light is too bright, it could cause temporary blindness. It is always important to use caution and avoid touching or ingesting unknown sources of light.

Can constant light without a source be used for practical purposes?

Yes, constant light without a source can be used for practical purposes. Bioluminescence has been studied and utilized in various fields, such as medical research, environmental monitoring, and even lighting in homes and buildings. Additionally, light reflection and refraction are important concepts in fields such as optics and photography.

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