Assertion (A): If one half of a mirror is covered by an opaque material, then only half image of the object is formed.
Reason (R): By covering one half of the mirror, focal length of mirror will be halved.
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false
Solution:
Covering half a mirror reduces the intensity of the image but a complete image is still formed. The focal length of a mirror depends only on its radius of curvature, not on the aperture or how much of its surface is exposed.
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