Given: Object distance, u = -30 cm,
image distance, v= +60 cm
height of the object, h1 = 2.4 cm
we need to find the focal length
Since there is +ve sign on image distance because the image is formed on the screen and image will be a real image.
Applying the lens formula:
Since focal length is positive, so the lens is a convex lens.
Magnification is given by,
The nature of the image formed will be: Real, inverted, and magnified.
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