Question
A concave mirror of small aperture forms a sharper image.
Answer: Option A
:
A
The rays of light travelling parallel to the principal axis, after reflection from a concave mirror meet at a single point onlyif the beam of light is narrow or if the mirror is of small aperture. In case, a wide beam of light falls on a concave mirror of large aperture, the rays after reflection would not converge at a single point. Therefore, if the aperture of the mirror is small, the image formed will be sharper.
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:
A
The rays of light travelling parallel to the principal axis, after reflection from a concave mirror meet at a single point onlyif the beam of light is narrow or if the mirror is of small aperture. In case, a wide beam of light falls on a concave mirror of large aperture, the rays after reflection would not converge at a single point. Therefore, if the aperture of the mirror is small, the image formed will be sharper.
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