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An object infront of a concave mirror of...

An object infront of a concave mirror of focal length f. A virtual image is formed with a magnification of 2. To obtain a real image of same magnification the object has to be moved by a distance

A

f

B

f/2

C

3f/2

D

2f/3

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • When an object is placed in front of a concave mirror of focal length f, a virtual image is produced with a magnification of 2. To obtain a real image with a magnification of 2, the object has to be moved by a distance equal to

    A
    `(f)/(2)`
    B
    `(2f)/(3)`
    C
    f
    D
    `(3f)/(2)`

  • If an object is placed 10 cm infront of a concave mirror of focal length 20cm, the image will be

    A
    Diminished, upright, virtual
    B
    Enlarged, upright, virtual
    C
    Diminished, inverted, real
    D
    Enlarged, upright, real

  • Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then linear magnification of the image

    A
    1
    B
    `lt1`
    C
    `gt1`
    D
    zero

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