Solve Width of Aperture: Find Width Now!

[BuBbLeS01]

Width of Aperture...please help!

Homework Statement

A point source of light illuminates an aperture 2.3 m away. A 10.2-cm-wide bright patch of light appears on a screen 1.02 m behind the aperture. How wide is the aperture?

Homework Equations

The Attempt at a Solution

I can't figure out how to do this?

 

[BuBbLeS01]

woops this was supposed to go under physics...please remove! thanks!

 

[tiny-tim]

… just geometry …

Homework Statement

A point source of light illuminates an aperture 2.3 m away. A 10.2-cm-wide bright patch of light appears on a screen 1.02 m behind the aperture. How wide is the aperture?

Actually, this is geometry, not physics.

Just draw a diagram, apply ordinary geometry of similar triangles, and you should get the answer!