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Light in a Box

Light in a Box

Postby jate_nohnson » Sun May 14, 2017 3:05 am

Imagine this idea.

There's a perfectly reflective mirror covering the entire inside surface of a perfectly spherical container. What would happen if, hypothetically, one was to cut a hole into the container, shine a light into the container, and then, faster than light could escape the container, perfectly refill the hole.

Then, in 100 years, one checked on the inside of the sphere. Would the light still be there? Would it be giving off energy? If not, what would the light be doing for those 100 years?
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Re: Light in a Box

Postby JohnDuffield » Mon May 15, 2017 8:28 pm

If it's perfectly reflective, the light would be still there. It wouldn't be giving off energy.

Funnily enough the electron is something like what you describe. In a way pair production traps light in a "container" of its own making.

See Hans Ohanian’s 1984 paper what is spin? here: http://aforrester.bol.ucla.edu/docs/Spin_Ohanian.pdf
Also see Light is Heavy by van der Mark and (not the Nobel) ‘t Hooft: https://arxiv.org/abs/1508.06478 . It’s about light in a box.
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