At age forty, a man requires contact lenses (f = 65.0cm) to read a book held 25.0cm
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At age forty, a man requires contact lenses (f = 65.0cm) to read a book held 25.0cm from his eyes. At age forty-five, while wearing these contacts he must now hold a book 29.0 cm from his eyes.
(a) By what distance has his near point changed?
(b) What focal length lenses does he require at age forty-five to read a book at 25.0 cm?
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a Using the thinlens equation we have In other words at age 40 the mans ...View the full answer
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