Qstnid -I-10-why Are The Magnification Properties Of Microscopes And Telescopes Defined In Terms Of The Ratio Of Angles And Not In Terms Of The Ratio Of Sizes Of Objects And Images? - 19: Optical Instruments

with Solutions -

#10
Why are the magnification properties of microscopes and telescopes defined in terms of the ratio of angles and not in terms of the ratio of sizes of objects and images?
Ans : Instruments like telescopes and microscopes deal with objects placed at different distances. Due to some physical factors, there is a relative change in heights not in the angle which the light emerging from them subtends on the lens. So, the magnification properties of instruments are defined in terms of the ratio of angles.
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