Question

5. Two concave mirrors 'A' and 'B'have the same radius of curvature and are used to focus the
same distant object. 'A' forms a sharper image as compared to 'B' on a given white screen,
What could be the difference in the two mirrors?

Answer 1

Answer:

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Explanation:

For an object at infinity, all the paraxial rays after reflection from the concave mirror will pass through the focus, thus the image is formed at focus. Hence the focal length of the concave mirror can be determined by measuring the distance between the screen and the mirror.  

Answer 2

Answer:

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