Where is focus situated for plane mirror?

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Pankaj Kumar

BE(Electronics)

The focus of the plane mirror is at Infinity
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Online Chemistry tutor with 15 years of experience

At infinity
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Focus of a mirror is the point where the where the rays parallel to axis of the mirror meet after reflection. For a plane mirror, the rays parallel to the axis of the mirror fall perpendicularly to the mirror and reflected back along the same path so technically they all such reflected rays are parallel...
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Focus of a mirror is the point where the where the rays parallel to axis of the mirror meet after reflection. For a plane mirror, the rays parallel to the axis of the mirror fall perpendicularly to the mirror and reflected back along the same path so technically they all such reflected rays are parallel to each other and hence said to meet at infinity, hence you can say technically that focus of plane mirror lies at infinity. read less
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At infinity.
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PGT-Physics

A plane mirror can be considered as a spherical mirror of infinite radius. Also its focal length (half of radius) is infinity and the focus is located at infinity.
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Infinite
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Computer Expert

Since f = -R/2, where R is the radius of curvature of the mirror. The radius of curvature for a flat surface to be infinity. Therefore f=infinity.
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Hi, An object viewed using a flat mirror appears to be located behind the mirror, because to the observer the diverging rays from the source appear to come from behind the mirror.
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Teaching is my passion!!!!

At infinity
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"Read , Recall and Procure"

infinity
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