I've just started special relativity and got a question:
Suppose at $t=t'=0$, there is a bar between $x_1=0$ and $x_2=1$ resting in my frame.
Then, to a person moving with velocity $v$ the length will be:
$\Delta x' = \gamma(\Delta x-v\Delta t) = \gamma(1 - v0) = \gamma$
Since $\gamma \gt 1$, the length in moving frame seems to expand, but I'm told that it should contract..
What's wrong in my understanding?