Optical Surfaces Ltd. is a leading international supplier of concave and convex spherical mirrors made to your exact specification. A spherical mirror is a mirror which has the shape of a piece cut ...

For most of us, mirrors are something we buy instead of build. However, [Unnecessary Automation] wanted to craft mirrors of his own for a custom telescope build. As it turns out, producing ...

A concave mirror ... a distance larger than the mirror's focal length, an inverted image of the filament appears on the wall. Ask the class what will happen if an index card covers part of the ...