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A concave lens causes parallel rays entering it to spread apart rather than cross. What is such a lens called?
AA converging lens
BA diverging lens
CA corner reflector
DAn achromatic doublet
Answer & Solution
Correct answer: B. A diverging lens
1. A concave lens causes light rays entering it parallel to its axis to bend away from the axis.
2. Because it makes rays diverge rather than converge, it is called a diverging lens.
3. A converging lens instead brings such rays together at a focal point, the opposite behaviour.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.3 Lenses_
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