Why is ##\omega_c \tau >>1## for several revolutions?

[Abigale]

Hey,
I read about charge carriers in semiconductors in a magnetic field.
They write that for several revolutions $\omega_c \tau >>1$ holds.
But I think for one revolution it is $\omega_c \tau = 2 \pi$.
($\tau$ is the scattering time)
Why they do not write $\omega_c \tau >> 2 \pi$ in the solid state physics books?

Thank you
Abbi

 

[kuruman]

Think for a moment what $a>>b$ means as opposed to $a>b$. This is an "order of magnitude" comparison. If 1,000 is much greater than 1 so is 6,318.53071 ...

 

[Abigale]

Okay thank you,
makes sense.
But I would write larger than $>>2 \pi$ to denote to get more than one revolution.