# Invariance of interval in SR

1. Aug 6, 2011

### TrifidBlue

Last edited by a moderator: Apr 26, 2017
2. Aug 6, 2011

### bcrowell

Staff Emeritus
I can't view the book through the link.

3. Aug 6, 2011

4. Aug 6, 2011

### bcrowell

Staff Emeritus
The solution isn't to give us links to illegal online copies.

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

5. Aug 6, 2011

### WannabeNewton

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).

6. Aug 6, 2011

### TrifidBlue

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

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

7. Aug 6, 2011

### TrifidBlue

I figured it out, thanks for your help :D