An object is placed in front of a screen and a convex lens is placed at a position such that the size of the image formed is 9 cm. When the lens is shifted through the a distance of 20 CM the size of the image becomes 1 cm. Find the focal length of the lens and size of the object.
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10
hey mate their is your answer....
As the lens is convex, f=15 cm
As the lens is convex, f=15 cmFor real image
As the lens is convex, f=15 cmFor real image
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Answered by
19
f=7.5 cm
size =3cm
this is the correct answer . mark as brainliest
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