Question

A concave mirror have focal length 15 cm 5cm long rod ii placed on a principle Axis what will be the size of image
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Answer 1

here is your answer mate...

the size of image will differ at different distance from the mirror..

i. e. 1-If the object will be At centre of curvature the size of image will be of same size that of object i. e. 5cm according to your question.

2-If object will be before the centre... the size of image will be smaller.

3-If object will be between the centre of curvature and focus then the image will be larger in size.

4-If the object will be at focus then the image will be formed at infinity... and highly magnified.

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