State the law of reflection for a plane surface.

A ray strikes a plane mirror at \(35^\circ\) to the normal. Find the reflection angle.

A ray makes \(20^\circ\) with the mirror surface. What angle does it make with the normal?

An object is \(2.0\,\mathrm{m}\) in front of a plane mirror. Where is the image?

What is the lateral magnification of a plane mirror?

Why is a plane-mirror image called virtual?

A person stands \(1.5\,\mathrm{m}\) from a plane mirror. How far is the person from their image?

A plane mirror is rotated by \(10^\circ\). By how much does the reflected ray direction rotate for a fixed incident ray?

Why must incidence and reflection angles be measured from the normal?

A reflected ray makes \(55^\circ\) with the normal. What was the angle of incidence?

What is the image distance sign for a plane mirror using the real-is-positive convention?

Use the plane-mirror relation \(s'=-s\) to derive the magnification.

A vertical object of height \(0.80\,\mathrm{m}\) is in front of a plane mirror. What is the image height?

Why can a plane mirror reverse left and right in appearance without reversing up and down?

Two plane mirrors meet at right angles. A ray reflects once from each mirror. How does the final ray direction compare with the original direction?

A person wants to see their full height in a vertical plane mirror. What minimum mirror height is needed?

Does moving closer to a plane mirror change the minimum mirror height needed to see your full body?

Explain ray reversibility for plane reflection.

Why does a rough surface produce diffuse reflection even though each small patch obeys the reflection law?

Use symmetry to justify the plane-mirror image position.