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Class 10 Science
Light-Reflection And Refraction Chapter 10
Quiz 2
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A concave lens produces an image 20 cm from the lens for an object placed 30 cm from the lens. The focal length is
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-40 cm
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+60 cm
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-60 cm
If a, b, c and d represent object distance, image distance, focal length and radius of curvature in case of a spherical mirror, then:
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A
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B
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C
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D
The maximum image distance in case of a concave lens of focal length 'f' is :
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2f
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3f
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f
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4f
If the image formed by a concave mirror is observed to be virtual, erect and larger than the object then the position of the object will be
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between infinity and centre of curvature
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between the pole of the mirror and its principal focus
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at centre of curvature
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between the focus and centre of curvature
SI unit of power of lens is
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Micrometre
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Dioptre
0%
Kilometre
0%
Metre
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