At age forty, a man requires contact lenses (f5 65.0 cm)
Chapter , Problem 121(choose chapter or problem)
At age forty, a man requires contact lenses (f5 65.0 cm) to read a book held 25.0 cm from his eyes. At age forty-fi ve, 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-fi ve to read a book at 25.0 cm?
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