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An object is placed at a distance of 25 ...

An object is placed at a distance of 25 cm from a concave mirror and a real image a formed by the mirror at a distance of 37.5 cm.
The focal length of the mirror is

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The correct Answer is:
15 cm
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An object is placed at a distance of 25cm from a concave mirror and a real image is formed by the mirror at a distance of 37.5cm What is the length of the mirror? Now if the object is moved 15cm towards the mirror, what will be the image distance, its nature and magnification ?

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Knowledge Check

  • An object is placed at a distance of 25 cm from a concave mirror and a real image a formed by the mirror at a distance of 37.5 cm. The magnification of the image will be

    A
    2 times
    B
    4 times
    C
    5 times
    D
    1.5 times

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    A
    20 cm
    B
    25 cm
    C
    30 cm
    D
    45 cm

  • An object is placed at a distance of 20 cm from a concave mirror of focal lenght 10 cm. What is the image distance?

    A
    20 cm
    B
    6.67 cm
    C
    10 cm
    D
    30 cm

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    The image of an object placed at a distance of 40 cm from a convex mirror is formed at a distance of 10 cm from the mirror. If object approaches the mirror with a velocity of 32 cm * s^(-1) , what will be the velocity of the image ( "in" cm * s^(-1))

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    If an object is placed at a distance of 40 cm from a concave mirror of focal length 20 cm , them the image wil be

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