- #1
aleksbooker
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Homework Statement
Two 3.0m wide mirrors meet at a corner. Taking the corner as the origin of the x/y axis, A red ball is placed at point A (-1m, -2m).
1) How many images are seen by an observer at point O? [Point O is not given coordinates, but looks to be at approximately (-3m, -3m)].
2) What are the (x,y) coordinates of each image?
Homework Equations
The Attempt at a Solution
I figured there were at least two virtual images, one behind each mirror at a point perpendicular to the red ball. So there's an image directly north of the ball (-1m, 2m) and directly east of the ball (1m, -2m).
Apparently, the third image is located at (1m, 2m) and I have no idea why or how I would have found that. I know that light from the ball strikes both mirrors before reaching the observer, and that the angles of incidence are all the same, but I don't know how to calculate *what* the angle of incidence is! :(