This is a combination of a concave and convex mirrors aligned axially, wherein the concave mirror has a hole in the center.
Whereas the concave mirror is having a hole in the center. This is a combination of a concave and convex mirrors aligned axially.
This is a combination of a concave and convex mirrors aligned axially. Whereas the concave mirror is having a hole in the center.
This is a combination of a concave and convex mirrors aligned axially. Whereas the concave mirror is having a hole in the center.