# Elliptical Concave Mirror

Level pending

Find the focal length of a concave mirror made from a small section cut out from near the vertex of an ellipsoidal reflecting surface symmetrically about its major axis.

Details:

• Ellipsoid is made by rotating the ellipse $$\frac{x^2}{16}+\frac{y^2}{8} =1$$ about its major axis.
• Rays incident on this mirror can be considered paraxial to the major axis
×