Physics - Geometrical Optics Question with Solution | TestHub

This stem overrides the passage: both disks now rotate the same way with angular velocity $\omega$.

After one reflection the beam rotates at $2\omega$ (rule ${\omega }_{\text{out}}=2{\omega }_{\text{mirror}}-{\omega }_{\text{in}}$); since the second mirror turns the same way as the first, the next reflection gives $2\omega -2\omega =0$.

The pattern repeats: $\Omega =2\omega$ for odd $n$ and $0$ for even $n$ - option (D).