help with optics.....

[Prashan_punk]

i have prob understandin the following proof.........

 

 

 

IN THE CASE OF SIMPLE MICROSCOPE IF IMAGE FORMS IN INFINITY THEN HOW CAN WE PROOVE= MAGNIFICATION(m) = D/f

 

where 'D' IS LEASE DISTANCE OF DISTINCT VISION AND F = FOCAL LENGTH

[orpheus]

reiterate, I do not understand the question..

[Prashan_punk]

when the image forms at infinity how can we proove

 

M= D/F

 

M= MAGNIFICATION

D= LEAST DISTANCE OF DISTINCT VISION

F= FOCAL LENGTH

[Prashan_punk]

please help to figure out>>>>

[orpheus]

You need to approach the question with limits, when M and D approach infinity M approaches 1. But a magnifying lense with a focal poit at infinity is not a maginifying lense at all.