Question

For a given incident ray, if the plane mirror is rotated through an angle of $\theta$ the reflected ray rotates through an angle

• A. $\theta$
• B. $2\theta$
• C. $4\theta$
• D. $\theta /2$

Answer 1

The correct option is B $2\theta$

When a plane mirror is rotated by an angle $\theta$, then the reflected beam suffers a deviation of $2\theta$.