Trapping Light: An Infinite Source of Energy?

In summary, if you had a perfect cube of perfect mirrors and put an object in the center, you would have an illuminated object for infinity. However, this is impossible as there is no way to trap light between two mirrors without it being disrupted.
  • #1
Mutsi
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Knowing that light goes on in infinity. Would it theoretically be possible to trap light between two mirrors? And have an infinite source of light which would require no energy once it has been trapped.
 
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  • #2
Welcome to PF.

1. No. There's no such thing as a perfect mirror.
2. If the light is trapped between two mirrors, it doesn't provide a source of light - it's trapped!
 
  • #3
Well, assuming it was a perfect mirror, then you could trap the light forever.

However, it would not be a source of light. If you let the light out to illuminate something, it would no longer be in the box, it would be bouncing off the illuminated object so that you could see it.

So theoretically you could "trap" the light, but not use it as a light source. You can't have your photon and see it too.

Edit to add: As Russ said, there is no such thing as a perfect mirror.
 
  • #4
Disconnected said:
You can't have your photon and see it too.
Nice.
 
  • #5
Absolutely logical answers which I did not think of.
I did not knew a mirror would cause a loss of energy although obvious!

Now assume that I would have a perfect cube of perfect mirrors and have an object in the center. In that case I would have an illuminated object for infinity. Right?EDIT: Wait the object in the center would cause a loss of energy or be a perfect mirror itself and then no light would be visible.
 
  • #6
Mutsi said:
Absolutely logical answers which I did not think of.
I did not knew a mirror would cause a loss of energy although obvious!

Now assume that I would have a perfect cube of perfect mirrors and have an object in the center. In that case I would have an illuminated object for infinity. Right?
Only if the object was a perfect mirror and didn't absorb any of the light!
 
  • #7
Disconnected said:
Only if the object was a perfect mirror and didn't absorb any of the light!

You beat me there I edited the previous comment but I was to late. In the above case of course still no light would be visible.
 
  • #8
Some folks say photons have mass. Would a really fine scales provide clue to remaining light without peeking? Just to prove it worked if it possibly could. (It cannot, but that is beside the point.)
 
  • #9
Discord7 said:
Some folks say photons have mass.
What folks?
 
  • #10
Discord7 said:
Some folks say photons have mass

Some folks say they found the higgs boson
 
  • #11
Mutsi said:
Absolutely logical answers which I did not think of.
I did not knew a mirror would cause a loss of energy although obvious!

Now assume that I would have a perfect cube of perfect mirrors and have an object in the center. In that case I would have an illuminated object for infinity. Right?


EDIT: Wait the object in the center would cause a loss of energy or be a perfect mirror itself and then no light would be visible.

Mutsi, light "self propagates" but DOES NOT multiply itself while travelling.

Infinity is ONLY with respect to a photons travel through entirely unimpeded space.

This DOES NOT mean that photons are infinitely created when the source is shut-off and the photons "trapped"
ONLY a set number of photons are "trapped" between ideal mirrors and ONLY the same set number of photons are available. There is no increase in the amount of photons.

As such, infinite illumination in this case is impossible.
 
  • #12
DaveC426913 said:
What folks?

Well, to the casual observer, folks explaining gravitational redshift seem to be making that implication.
 
  • #13
You know that the OP is straight of troll physics.
 
  • #14
Discord7 said:
Well, to the casual observer, folks explaining gravitational redshift seem to be making that implication.

That light has mass? No.
 
  • #15
DaveC426913 said:
That light has mass? No.

Pleading no contest.
 
  • #16
Mutsi said:
Some folks say they found the higgs boson
Yep, it was in my closet right behind the bowling ball! Forgot I put it there.

Now assume that I would have a perfect cube of perfect mirrors and have an object in the center. In that case I would have an illuminated object for infinity. Right?
Yes, but no one could see it so it wouldn't matter if it were illuminated or not!
 
  • #17
HallsofIvy said:
Yes, but no one could see it so it wouldn't matter if it were illuminated or not!

No, wrong, that object would absorb and re-radiate energy as a different wavelength, probably heat, and escape the mirrors, conductively.
 
  • #18
pete20r2 said:
No, wrong, that object would absorb and re-radiate energy as a different wavelength, probably heat, and escape the mirrors, conductively.
If we want to argue about what could actually happen in practice, it comes back to not having perfect mirrors in the first place.
 
  • #19
Lets end this topic since my question was answered and we are in no need of needless discussions. Thank you.
 

FAQ: Trapping Light: An Infinite Source of Energy?

What is trapping light and how does it provide an infinite source of energy?

Trapping light is a process in which light is confined and controlled within a specific space or material. This trapped light can then be used to generate energy through various methods, such as converting it into electricity or using it for chemical reactions.

What are the potential applications of trapping light for energy production?

The potential applications of trapping light for energy production are vast and diverse. It can be used in solar panels, where trapped light is converted into electricity, or in photocatalytic processes to produce fuels such as hydrogen. It can also be used in optical fibers for efficient data transfer and in optoelectronic devices for energy-efficient lighting.

How does trapping light compare to other renewable energy sources?

Trapping light has several advantages over other renewable energy sources. It is a clean and abundant source of energy that does not produce greenhouse gases or other pollutants. It is also more reliable and consistent than other renewable sources, such as wind or solar power, as it can be harnessed even on cloudy days or at night.

What are the challenges in developing technology for trapping light?

There are several challenges in developing technology for trapping light. One of the main challenges is finding materials that can effectively trap light and maintain its trapped state for a sufficient amount of time. Another challenge is finding ways to efficiently convert the trapped light into usable forms of energy.

What are the potential drawbacks of relying on trapping light as a primary source of energy?

One potential drawback of relying on trapping light as a primary source of energy is the initial high cost of developing and implementing this technology. Additionally, as with any renewable energy source, there may be limitations in terms of geographical location and varying levels of efficiency. There may also be concerns about the environmental impact of using certain materials for trapping light. Further research and advancements in technology are needed to address these potential drawbacks.

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