Find position size and nature of the image formed by a convex lens of focal length 20cm if size of the image is equal to the size of the object
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Answer:
The image will be real, inverted and will be formed 40cm on opposite side of lens and image size will be 40cm
Explanation:
the image size= object size
image distance = object distance
focal length =20cm
thus putting values in 1/u+1/v=1/f,
1/v +1/v=1/20
or, 2/v=1/20
or, v=40
the image distance =40cm =2 focal length
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