Wave OpticsHard
Question
Four lenses having the focal length of = 15 cm, 20 cm, and + 250 cm respective are pro vided to make an astronomical telescope. The focal length of the eyepiece tproduce the largest magnification, should be :
Options
A.+ 250 cm
B.+ 155 cm
C.25 cm
D.+ 15 cm
Solution
In case of astronomical telescope, megnification = 
for maximum magnification, fe should be least. So, fe should be 15 cm.
for maximum magnification, fe should be least. So, fe should be 15 cm.
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