Multiple choice

If a lens diverges a parallel beam of light

  1. planoconvex

  2. convex

  3. cylindrical

  4. concave
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A concave lens is thinner at the center than at the edges and causes parallel light rays to diverge (spread out) after passing through it. This diverging property is why concave lenses are used to correct myopia. Convex and planoconvex lenses are converging lenses, while cylindrical lenses correct astigmatism.

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