# Invariance of interval in SR

## Answers and Replies

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bcrowell
Staff Emeritus
Science Advisor
Gold Member
I can't view the book through the link.

You can download it as PDF [deleted copyright-violating link - bcrowell]
Or as djvu file [deleted copyright-violating link - bcrowell]

bcrowell
Staff Emeritus
Science Advisor
Gold Member
The solution isn't to give us links to illegal online copies.

How about just writing out the details of the argument for us?

WannabeNewton
Science Advisor
Have you tried showing $M_{0i} = 0$ yourself? If you can do that, the rest follows quite naturally but I should probably point out that this is a homework problem (its an exercise at the end of the chapter).

bcrowell, I'm sorry, for putting _illegal online copies.

WannabeNewton, I'll try again, I didn't notice it was an exercise. thanks.

Have you tried showing $M_{0i} = 0$ yourself? If you can do that, the rest follows quite naturally but I should probably point out that this is a homework problem (its an exercise at the end of the chapter).
I figured it out, thanks for your help :D