question_answer 30)

What should be the distance between the objectin the previous exercise and the magnifyingglass if the virtual image of each square in thefigure is to have an area 6'25 mm2 ? Wouldyou be able to see the squares distinctly withyour eyes very close to the magnifier ? 

Answer:

The new area to be observed = 6-25 mm2. Length of each side Now linear magnification Now using Therefore, Sincei.e., the imagelies at distance less than the least distance ofdistinct vision from the eye, it can not be observed distinctly.