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Q.

Which one of the following diagrams is incorrect when a light ray is incident on a concave or convex mirror?


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a

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b

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c

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d

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answer is D.

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Detailed Solution

The diagram in 4th option is incorrect.
In the 4th diagram, the light ray passing through the focus of the concave mirror goes back in the same path after reflection, which is against the laws of reflection. We know that when a ray of light passes through the focus of a concave mirror, it becomes parallel to the principal axis of the mirror. So the correct ray diagram would be,
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