Richard_P_Feynman
Literotica Guru
- Joined
- Oct 5, 2017
- Posts
- 1,449
Yes, that makes sense. Energy first.
There's a neat thought experiment involving a perfectly mirrored, massless box containing a (large) number of photons. It's possible to derive the box's resistance to being accelerated, based on the momentum of the photons and the Doppler shift. Turns out that resistance is exactly equivalent to attributing inertial mass equal energy of the photons.