American Board of Opticianry (ABO) Practice Test

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What characterizes minus lenses?

the speed of light in air divided by the speed of light in the material
minus spheres are used for farsightedness
can be characterized by diverging/with motion
plus lenses can be characterized by converging/against motion

The correct answer is: can be characterized by diverging/with motion

Minus lenses are characterized by their ability to diverge light. This is in contrast to plus lenses (option D) which can converge light. Option A and B do not accurately describe the characteristics of minus lenses and thus are incorrect.