Bikerman

A couple of years ago I wrote an intro to Special Relativity. I've just dug it out with a view to polishing it up and sticking it on my website.

In the paper I show how the time dilation factor can be derived simple, using nothing more than Pythagoras. Trouble is, I've forgotten how I managed one of the steps in the simplification - complete mental blank.

A copy of my working is below - how did I go from 4 to 5? Anyone?

(How embarrassing.... )

In the paper I show how the time dilation factor can be derived simple, using nothing more than Pythagoras. Trouble is, I've forgotten how I managed one of the steps in the simplification - complete mental blank.

A copy of my working is below - how did I go from 4 to 5? Anyone?

(How embarrassing.... )