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Will the reflected rays converge at a po...

Will the reflected rays converge at a point when a parallel beam of light is incident on a concave mirror of large aperture ?

Text Solution

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No, this occurs because of spherical aberration of the mirror. Paraxial rays are focussed at the principal focus and marginal rays are focussed between pole and principal focus of the mirror.
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Knowledge Check

  • If a converging beam of light is incident on a concave mirror, the reflected light

    A
    May form a real image
    B
    Must form a real image
    C
    May form a virtual image
    D
    May be a parallel beam

  • A coverging beam of light is incident on the concave mirror. Then the reflected light :

    A
    forms real image
    B
    it may form virtual image
    C
    forms virtual image
    D
    none of these

  • A convergent beam is incident on a convex mirror. Reflected light

    A
    may form a real image
    B
    may form a virtual image
    C
    must form a real image
    D
    must form a virtual image

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