List two uses for concave lens?

Answer 1

Both concave and convex lenses are used in glasses; A microscope, like a reflecting telescope, uses a concave mirror, a plane mirror, and a convex lens; A refracting telescope uses two convex lenses to magnify images in the sky; binoculars use concave lenses to improve detail.

Answer 2

A concave lens can be used for magnifying glasses and glasses to correct nearsightedness.

EDIT: Magnifying glasses use convex lenses, as those lenses ENLARGE objects.

Answer 3

An instrument that uses convex lenses are cameras and microscopes.

Answer 4

some cameras have it

Answer 5

Peepholes such as in hotel rooms

Answer 6

inside of a spoon.