How small a box can you confine a photon to before its mass is large enough to form a black hole?(adsbygoogle = window.adsbygoogle || []).push({});

I think you can make an estimate on the momentum (and therefore the energy) based on the size of the box using the Uncertainty Principle - knowing the energy gives you the mass via E=mc^2, but how do you figure out the mass and size needed to form the black hole?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Confining a photon to form a black hole

Loading...

Similar Threads for Confining photon form |
---|

I Does a blueshift change the energy of a photon? |

I Why doesn't a photon's mass increase to infinity? |

B Why can't light travel faster than c? |

B Proper time of photon in Friedman metric |

B Photons, mass, and black holes |

**Physics Forums | Science Articles, Homework Help, Discussion**