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If an object is placed at the focal point of a convex lens, the image formed is said to be real and highly magnified. My question is that if the image is formed at infinity, how can it be termed as highly magnified. Why is it not refered to as infinitely magnified? Also, if the image is still refered to as highly magnified, then what would be the magnitude of magnification? Thanks Khalida Qureshi

If an object is placed at the focal point of a convex lens, the image formed is said to be real and highly magnified.


My question is that if the image is formed at infinity, how can it be termed as highly magnified. Why is it not refered to as infinitely magnified?


Also, if the image is still refered to as highly magnified, then what would be the magnitude of magnification?


Thanks


 


Khalida Qureshi

Grade:

1 Answers

Chetan Mandayam Nayakar
312 Points
10 years ago

the standard theory of geometrical optics breaks down in this case. An image can be said to be formed only when different rays of light converge at a single point after passing through the lens. If object is placed at focus of convex lens, the rays emerging from the lens are parallel and do not converge at all. Therefore, one can say that no image is formed at all.

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