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Image Formation by Spherical Mirrors

At what posit...

Question

At what position of the object does a convex lens act as a magnifying glass?
(a) between F and 2F
(b) between F and O
(c) beyond F
(d) beyond 2F

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Solution

(b) between F and O

In this case, the image formed is virtual, erect and bigger than the object.

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Q. A convex lens produces a magnification of + 5. The object is placed:
(a) at focus
(b) between f and 2f
(c) at less than f
(d) beyond 2f

Q. Draw ray diagrams to show image formation by a convex lens in the following cases.
(a) the object is at 2F
(b) the object is between F and 2F
(c) the object is beyond 2F

When the object is placed beyond 2F in front of convex lens, the image is formed

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Q. A concave mirror forms a virtual and magnified image when the object is placed
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(b) beyond 2F.
(c) at 2F.
(d) between the lens and F.

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