Question: A student is reading material written on a blackboard. Her contact lenses have a refractive power of 57.50 diopters; the lens-to-retina distance is 1.750 cm.

A student is reading material written on a blackboard. Her contact lenses have a refractive power of 57.50 diopters; the lens-to-retina distance is 1.750 cm.
(a) How far (in meters) is the blackboard from her eyes?
(b) If the material written on the blackboard is 5.00 cm high, what is the size of the image on her retina?

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