Timeline for Center of mass of two $\gamma$ rays moving in opposite directions
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 20, 2014 at 15:03 | comment | added | Drake Marquis | uh... I don't understand English anymore... sorry | |
| Nov 20, 2014 at 14:41 | comment | added | dmckee --- ex-moderator kitten | Center of mass is a position (for solid system the place where you could push on it in any direction and impart no rotation), mass is a ... well ... masss. | |
| Nov 20, 2014 at 14:38 | comment | added | Drake Marquis | @dmckee The mass of the system is different from the center of mass? | |
| Nov 20, 2014 at 14:34 | comment | added | dmckee --- ex-moderator kitten | The calculates the mass of the system (and demonstrates that a system composed of two massless particles can have a non-zero mass), but not the center of mass. | |
| Nov 20, 2014 at 14:26 | comment | added | Drake Marquis | The total energy is $h\nu_1+h\nu_2$ and the total momentum is $h\nu_1-h\nu_2$. Plug in the formula $m^2=E^2-p^2$ you get this expression. | |
| Nov 20, 2014 at 14:22 | comment | added | Thiago | Could you explain how you came up with this equation? | |
| Nov 20, 2014 at 14:20 | history | answered | Drake Marquis | CC BY-SA 3.0 |