I have a few question from the book. I am going to split into multiple posts due to the limitation of the number of images per post. These are the formulas from the book which I understand:

(10.65)

(10.66)

Where

Last edited by yungman; May 13th 2011 at 10:51 AM.

Below I copy straight from the book and I will point out my question at the end:

[BOOK]

The quantity in brackets of (10.66) is strikingly similar to the one in (10.65), which can be written, using BAC-CAB rule as ; the main difference is that we have v instead of u in the first two terms.

1) In fact since it's all crossed into anyway, we can with impunity change these v into -u; the extra term proportional to disappears in the crass product.

2) The first term in E in (10.65) ( the one involve (c^2-v^2)u) falls off as the inverse square of the distance from the particle.

1) The second term( the one involving is therefore dominant at large distance.

[END BOOK]

Last edited by topsquark; May 13th 2011 at 01:38 PM.
Reason: Removed the color from line 2.