Spherical aberrations occur in mirrors due to

increased reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre

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increased refraction of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre

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decreased reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre

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decreased refraection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre

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Solution

The correct option is A increased reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre
Spherical aberration in mirrors are caused when parallel light rays are focused away from spherical mirror when they strikes the edge of the mirror.

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