The Lens Formula Relating the Image Distance,p,to the Focal Length,f,and

question 140

Multiple Choice

The lens formula relating the image distance,p,to the focal length,f,and object distance,s,is The magnification of a lens is
-A magnifying glass with focal length 15 cm is placed 10 cm above a stamp.The magnification of the magnifying glass in is

• A)+3.
• B)-3.
• C)+15.
• D)-15.
• E)+30.

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