ChrispenEvan said:

Tau.Neutrino said:

I’m not quite getting this bit.

>>>lasers can be used to lift and steer objects in multiple directions without physical contact..

I guess photons aren’t physical, in the classical sense, because they are massless. They do have momentum and this is what applies the force to move and steer an object which does have mass.

Thanks for that. That helps to clear it up.