Use the drop-down menus to identify whether each description represents a convex lens, a concave lens, or both.

Has a focal point:

Is thicker in the middle than near the edges:

Creates only a right-side-up image:

Causes light rays passing through it to refract:

A concave lens is

✔ thinner

in the middle than at the edges, and causes light rays to

✔ diverge

.

A convex lens is

✔ thicker

in the middle than at the edges, and causes light rays to

✔ converge

.

Explanation:

pure substance: iron,copper

impure substance: water,charcoal

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