Concave mirrors are mirrors that curve inward, causing light rays to converge at a focal point. They are often used in telescopes and makeup mirrors.
Focal Point: The point where all the light rays converge after reflecting off a concave mirror.
Real Image: An image formed by the actual convergence of light rays. It can be projected onto a screen.
Magnification: The ratio of the height of an object's image to the height of the object itself when viewed through a concave mirror.