LPF Site Supporter
- Oct 7, 2018
Does anyone know a dirty trick for determining the radius of curvature for a concave mirror?
You sure that's the right answer?Hit the mirror with a well collimated beam at a slight angle so the reflection is separated from the incident beam. Then you can measure the focal lenght pretty well.
See post 6Thanks, that is exactly what I will do. If I want to get fancy maybe I will target some pinholes. I was trying to figure a way to use 2 diiferent color beams and see at what point the image inverts. Just making it more difficult than it has to be. Your technique should be adequate. Thanks again.