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Cutting of Thin Lenses

An object A...

Question

An object $A B$ is kept in front of a concave mirror as shown in the figure.
(i) Complete the ray diagram showing the image formation of the object.
(ii) How will the position and intensity of the image be affected if the lower half of the mirror's reflecting surface is painted black?

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Solution

(i) Image formed will be between the focus and center of curvature, it would be inverted and smaller in size as apparent from the ray diagram.
(ii) If the lower half of the mirror's reflecting surface is painted black, the position of image will be same but its intensity gets reduced.

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