How far below the top edge does the ray strike the mirror?

[rayhan619]

Homework Statement

A light ray leaves point A in the figure, reflects from the mirror, and reaches point B. (Intro 1 figure) figure attached

How far below the top edge does the ray strike the mirror?

Homework Equations

The Attempt at a Solution

im not sure exactly where it says to mark?

 

[tiny-tim]

How far below the top edge does the ray strike the mirror?
…
im not sure exactly where it says to mark?

Hi rayhan619!

You have to mark the point where the light hits the mirror …

either use a theorem about reflection angles,

or draw the image of one and join it to the other.