4 ms·
Photons have momentum and energy.
by GW150914 8y ago
Photons have momentum and energy.
- gascan 8y agoRight, but if you bend their trajectory, does the device doing the bending experience any net force? Edit: just learned light cannot be bent by electric or magnetic fields, I must have been thinking of radiation particles.
- ben_w 8y agoIt will exert a force. I don’t know how waveguides work, but momentum is conserved (and photons have it) so it must exert a force.
- GW150914 8y agoYou can absorb light and emit new photons, but the only way to bend their trajectory is bending spacetime with gravity. Needless to say, the EMDrive doesn’t contain a black hole.