Question

A concave lens has focal length of 20cm . At what distance from the lens should the object be placed so that it forms a virtual and erect image 1pcm away from the lens ? What would be the size of the image formed if the object is 2cm high ? With the help of a ray diagram,show the formation of the image by the lens in this case.
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Answer 1

Explanation:

I think v=10cm.

plz mention that properly.

Answer 2

Answer:

v = 10 cm...................