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The object distance u, image distance v ...

The object distance u, image distance v and focal length 'f' for a spherical mirror are related as

A

1/v-1/u=1/f

B

1/u-1/v=1/f

C

v-u=f

D

u+v = f

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Knowledge Check

  • The relation between u , v and R for a spherical mirror is

    A
    `R = (2uv)/(u + v)`
    B
    `R = (2)/(u + v)`
    C
    `R = (2(u + v))/((uv))`
    D
    None of these

  • An object kept on the principal axis and in front of a spherical mirror, is moved along the axis itself. It lateral magnification m is measured and plotted versus object distance |u| for a range of u, as shown fig. The magnification of the object when it is placed at a distance 20 cm in front of the mirror is

    A
    `-1`
    B
    1
    C
    8
    D
    20

  • An object is placed at a distance of 40cm from a concave mirror of focal length 15cm. IF the object is displaced through a distance of 20cm towards the mirror, the displacement of the image will be

    A
    30cm away from the mirror
    B
    36cm away from the mirror
    C
    36cm towards the mirror
    D
    30cm towards the mirror

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