question_answer 29)

(a) At what distance should the lens be heldfrom the figure in the above exercise in order to view the squares distinctly with maximum possible magnifying power ? (b) What is the magnification (image size/object size) in this case ? (c) Is the magnification equal to magnifyingpower in this case ? Explain.  

Answer:

(a) The magnifying power is maximum ifthe image is formed at the least distance ofdistinct point from the eye,i.e., if v = -25 cm Also, f = 10 cm i.e.  (b) Linear magnification (c) Angular magnification the linear magnification and magnifyingpower is equal in this case.