Measuring the location of an object in space:
| (1) | {\bf r} = (x, \, y, \, z) |
in respect to some coordinate system ( {\bf e}_x, \, {\bf e}_y, \, {\bf e}_z).
Measuring the location of an object in space:
| (1) | {\bf r} = (x, \, y, \, z) |
in respect to some coordinate system ( {\bf e}_x, \, {\bf e}_y, \, {\bf e}_z).