This example purports to show reflection of light rays from a spherical mirror. It looks good, until you try to draw a ray from the tip of the candle flame, then through the focal point, $F$, and then emerging parallel to the optic axis $(CF)$.
Go ahead, draw it on your computer monitor screen, or print this page and draw it on the paper. Whoops! This ray should then pass through the image of the tip of the candle flame, but it doesn't!
Here's what you get when you draw the third light ray (in red) from the candle flame. It comes nowhere near the image of the candle flame. As soon as you draw some of the "missing" rays, you discover that the diagram becomes inconsistent.
According to me, the diagram seems to be perfect. From where did this anomaly come from? Please help.