Question

if light consists photons then why we can't trap it on a dark container and use it when we need it?​

Answer 1

Answer:

A device able to confine electromagnetic wave or lightor photon is called cavity. You should understand aphoton does not necessarily means a propagating plane wave. ... Therefore it is possible to trap a photonhowever as time-passes the energy of the photon will be lost to space

Answer 2

Although photons have no mass, they do have energy, and the gravity of a black hole (or any other gravitating body) will attract them. ... Although photons have no rest mass, they're always moving at the speed of light; their energy is all kinetic energy and not rest-mass energy.