A lens with a focal length of 25 cm produces real image of an object at a distance of 50cm from the lens .at what distance the object place from the lens?
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Answer:
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Explanation:
Distance of object from the mirror u=−50 cm
Distance of image from the mirror v=−10 cm
For lens, we know
f1=v1−u1
f1=−101−−501
f=−12.5cm
It is a concave lens.
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