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A point object O is placed in front of a...

A point object `O` is placed in front of a glass rod having spherical end of radius of curvature `30cm`. The image would be formed at

A

`30 cm` left

B

Infinity

C

`1 cm` to the right

D

`18 cm ` to the left

Text Solution

Verified by Experts

The correct Answer is:
A
By using formula `(mu_(2))/(v)-(mu_(1))/(u)=(mu_(2)-mu_(1))/(R)`
`implies(1.5)/(v)-(1)/((-15))=((1.5-1))/(+30)implies v= -30cm.`
Negative sign shows that, image is obtained on the same side of object `i.e.,` towards left.
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Knowledge Check

  • A point object O is placed in front of a glass rod having spherical end of radius of curvature 30 cm. The image would be formed at

    A
    30 cm lef
    B
    infinity
    C
    1 cm to the right
    D
    18 cm to the left

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    20 cm
    B
    30 cm
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    40 cm
    D
    50 cm

  • An object is placed in front of a concave mirror at a point between its centre of curvature and focus. The image will be formed at :

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    a point between the focus and the centre of curvature
    B
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