Lesson: Chapter 5 — Optics

5.4. Lenses 3 of 4 Reset answers

Clear all your answers?

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Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 3

Which lens is thinner in the middle than at its edges?

A None of them B A plano-convex lens C A concave lens D A convex lens

The right answer is the one marked above.

A concave lens. Concave surfaces curve inwards, leaving the middle thin.

Answer the question to continue.