A ray starting from the focus of a concave mirror becomes parallel to the principal axis after reflection.
True
False
For spherical mirrors having a small aperture, a ray starting from the focus becomes parallel to the principal axis after reflection.
State True or False:
A ray starting from the focus of a concave lens becomes parallel to the principal axis after refraction.
A spherical concave mirror focuses all rays parallel to its principal axis exactly onto the focus. True or False?