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Assertion: If object is placed between pole and focus of concave mirror and now mirror is broken and only half portion of mirror is left, then intensity of image will reduce.

Reason: Lesser reflecting surface will be available for reflection.

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Important Questions on Ray Optics and Optical Instruments

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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 3
The radius of curvature of concave mirror is 24 cm and the image is inverted and magnified by 1.5 times. The object distance is
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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 4
An object is placed in front of a convex mirror of focal length f. Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 5
A man having height 6 m, observes image of 2 m height erect, then mirror used is
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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 6
Two points P and Q lie on either side of an axis XY as shown. It is desired to produce an image of P at Q using a spherical mirror, with XY as the optic axis. The mirror must be

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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 7

A mirror producing a virtual image larger than the object is:

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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 8
A square wire of side 1 cm is placed perpendicular to the principle axis of a concave mirror of focal length 15 cm at a distance of 20 cm. The area enclosed by the image of the wire is
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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 9
A man has a concave shaving mirror of focal length 0.2 m. How far should the mirror be held from his face in order to give an image of two fold magnification?
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Achieve CUET (UG) Physics Practice Book>Chapter 9 - Ray Optics and Optical Instruments>Exercise>Q 10
A boy of height 1 m stands in front of a convex mirror. His distance from the mirror is equal to its focal length. The height of his image is