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25 Feb 2011 18:07:54 IST

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Two concave mirrors have the same focal length but the aperture of one is larger than that of the ot

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Two concave mirrors have the same focal length but the aperture of one is larger than that of the other. Which mirror forms the sharper image and why?

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Palanichamy.M

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Joined: 12 Apr 2011

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22 Apr 2011 18:13:10 IST

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Smaller mirror sharper image,

since it will produce less geometrical and chromatic abberation !

less distortion.

Am I right ?

ankurkumar

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24 Apr 2011 23:06:25 IST

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i think that it should be larger one. the reason is that first of all there is no chromatic abreetion for mirrors .arger one gathers more light hence the image formed will be of more intensity.

Palanichamy.M

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24 Apr 2011 23:21:32 IST

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larger mirror collects more light and the image is brighter.

But

Wider aperture produces aberation

Therefore mirror with smaller aperture produces sharper image

wider aperture without aberation only parabolic mirrors

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