Question

The ray diagram shown below is introduced to show how a concave mirror forms an image of an object:
a) Identify the mistake and draw the correct ray diagram.
b) Write the justifications for your corrections.

Answer 1

(a) In the diagram shown in the question, the light ray passing through the focus of the concave mirror after reflection goes back in the same path. The corrected diagram is shown.

(b) In the case of a concave mirror, the light ray which is passing through its focus after reflection passes parallel to the principle axis.