Q1. What focal length must a pair of glasses have if they are to correct the vision of a person with a near point of 57.5 cm? The glasses are worn 1.8 cm from the eye.

Q2. On a walk through a botanical garden, you notice a small leafy plant that is growing along an edge of the small stream in a shady nook. You hypothesize that this plant is a lycophyte. What information can you gather to test your hypothesis?