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A concave mirror of focal length 20 cm f...

A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at

A

25

B

40

C

none of these

D

at infinity

Text Solution

Verified by Experts

The correct Answer is:
c
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Knowledge Check

  • A concave mirror of focal length 15 cm forms an image having twice the linear dimension of the object. The position of the object, when the image is virtual will be

    A
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    B
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    C
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    D
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    B
    7.5 cm
    C
    30cm
    D
    45cm

  • A convex mirror of focal length 10 cm forms an image which is half of the size of the object. The distance of the object from the mirror is

    A
    10cm
    B
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