Question

Which of the following does not describe a ray that can be drawn for a concave mirror?

• A. An incident ray through the mirror's centre, reflecting right back through the centre
• B. An incident ray through the centre point, reflecting through the focal point
• C. An incident ray through the focal point, reflecting parallel to the principal to the principal axis
• D. An incident ray parallel to the principal axis, reflecting through the focal point

Answer 1

Answer: (B)

An incident ray through the centre point, reflecting through the focal point

Ray diagrams for a concave mirror is shown in the attached figure. Referring the diagram, option B is wrong. Light passing through the center point must be reflected back through the center point.