an object placed 4cm in front of convex lens produces a real image 12cm from the lens. find magnification, draw a ray diagram to determine the focal length of lens.
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given ....u=4cm
v=12cm
sice we know that
m=v/u
m=12/4
m=3 Ans
v=12cm
sice we know that
m=v/u
m=12/4
m=3 Ans
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