Question Bank - General Science

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An object is placed on the axis of a concave mirror at its focus (F). The image formed is:

A.
erect and enlarged
B.
inverted and of the same size
C.
inverted and highly diminished
D.
inverted and highly enlarged

Solution:

The correct answer is inverted and highly enlarged.Concept:Spherical mirror:A spherical mirror is a mirror that has the shape of a piece cut out of a spherical surface.There are two types of spherical mirrors: concave, and convex. Explanation:Concave mirror:It is part of a whole spherical mirror that reflects light from the hollow part.It is a converging mirror because it converges the incident rays at a point.When the object is at F (focus):Characteristics of Image Formed:Position: At infinitySize: Highly magnified/ enlarged Nature: Real and inverted Additional InformationAll six cases of image formation by the concave mirror:Object positionImage positionNature of imageSize of imageAt infinityAt FReal and inverted Point sized Beyond CBetween C and FReal and invertedDiminishedAt CAt CReal and inverted Same size Between C and FBeyond CReal and inverted Magnified At FAt infinity Real and invertedHighly magnified Between F and POn the backside of the mirrorVirtual and erect Magnified

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