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please answer this

Asked by Prashant DIGHE 29th January 2020, 10:21 PM
Answered by Expert
magnitude of magnification , |m| = v/u 
where v is mirror-to-image distance and u is mirror-to-object distance.

when object is at focal point, image formed at ∞ , hence magnification ∞  
when object is moved away from focal point , mirror-to-object distance u is increasing.
Hence magnitude of magnification is getting decreased.
When object is at a distance 2f from mirror , magnitude of magnification is 1 .
when object is moved further its magnitude of magnification is less than one.
All these features are seen only in graph-2 ,
hence graph-2 is the correct representation of variation of magnification ,
when object is moved away from focal point
Answered by Expert 30th January 2020, 10:09 AM
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