Question

Mirrors are better than lenses for making optical instruments.​

Answer 1

Answer:

The image formed by the convex mirror is actually an erect, diminished, virtual image, and it “appears” just a few inches behind the surface of the mirror. The object is much further away that it “appears” to be! Two points about a magnifying glass to begin with.

Answer 2

Answer:

Mirrors are better than lenses in that they are inherently free of chromatic aberrations, and are reflective over very wide spectral bandwidths. ... The downside is that the image and object are on the same side of the mirror, which makes things complicated.

Optical instruments are based on optics. They use mirrors and lenses to reflect and refract light and form images. The light microscope and telescope use convex lenses and mirrors to make enlarged images of very tiny or distant objects. A camera uses a convex lens to make a reduced image of an object.