A convex lens has a focal length of 20cm. If the object is placed at 30cm from the lens, then find the image distance. O
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A convex lens has a focal length of 20cm. If the object is placed at 30cm from the lens, then find the image distance. O
A convex lens has a focal length of 20cm. If the object is placed at 30cm from the lens, then find the image distance. O 30cm 40cm O 50cm 60cm
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