Thought Expirement: Light In a Mirrored box

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A theoretically perfect mirrored box can contain a single photon without absorption, leading to interesting implications for light behavior. Photons can stack within this confined space, creating a discrete spectrum of allowed energies akin to a laser. Each allowed frequency permits an arbitrary number of photons, suggesting that the box can hold multiple photons at different energy levels. The concept raises questions about the nature of light and its interaction with confined spaces. This thought experiment highlights the complexities of quantum mechanics and photon behavior in idealized conditions.
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A theoretically perfect mirror with no gaps cracks, (no absorbing surfaces), so small that only a single photon could tightly fit inside

Is it stopped? If so let's get our scales ;)
 
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so small that only a single photon could tightly fit inside
Photons can "stack" without any problems. Your box would have a discrete spectrum of allowed energies (corresponding to standing waves in the box), similar to a laser. For each allowed frequency, you can have an arbitrary amount of photons inside.
 
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