In: Physics
2A)
A convex mirror has radius of curvature of magnitude 20 cm.
(I) its focal length is + 10 cm
(II) its focal length is – 10 cm
(III) it produces only virtual images.
(IV) it produces only magnified images.
only IV |
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II and III |
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I and IV |
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only I |
2B)
An object is placed 20 cm in front of a concave mirror of radius 50 cm.
(I) the image is formed behind the mirror
(II) the image is inverted
(III) the image is magnified
(IV) the image is real
II and III |
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I and IV |
|
I and III |
|
II and IV |
2C)
A mirror produces a magnified image. Therefore
(I) it is a concave mirror
(II) it is a virtual image
(III) it is a real image
(IV) the magnitude of magnification is greater than 1
I and IV |
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III and IV |
|
II and IV |
|
I and III |
2D)
A mirror produces a reduced image. Therefore
(I) the magnification is negative
(II) it cannot be a concave mirror
(III) it cannot be a plane mirror
(IV) it is a convex mirror if the image is upright.
The correct answers are
III and IV |
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I and III |
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II and III |
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I and II |