A student suffering from myopia can see objects clearly only up to a distance of 1.0m. He wears spectacles fitted with identical thin concave lenses placed 2.0cm in front of his eyes.
a. (i) Determine the focal length of each spectacle lens so that objects at infinity appear distinct to the student.
b. (ii) With the help of a suitable ray diagram, show how these lenses enable the student to see a tree situated 100m away.
c. (iii) Calculate the linear magnification produced by the spectacle lens for the distant tree and comment on whether the apparent size of the object changes appreciably.