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It is desired to photograph the image of an object placed at a distance of 3 m from a plane mirror. The camera, which is at a distance of 4.5 m from the mirror should be focused for a distance of-

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Important Questions on Ray Optics

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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 14
An unnumbered wall clock shows time 04:25:37, where 1st term represents hours, 2nd represents minutes and the last term represents seconds. What time will its image in a plane mirror show?
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 15
Two plane mirrors, A and B, are parallel to each other and placed 20 cm apart. An object is kept in between them at 15 cm from A. Out of the following, at which point, an image is not formed in the mirror A? (Distance is measured from mirror A)
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 16
A thick mirror produces a number of images of an object. The brightest image is
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 17
If two mirrors are kept at 60° to each other, the number of images formed by them is
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 18
To get three images of a single object, one should have two plane mirrors at an angle of
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 19
A man is 6 feet tall. In order to see his entire image, he requires a plane mirror of minimum length equal to:
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 20
A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole, then it produces an image at-
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Alpha Question Bank for Medical: Physics>Chapter 30 - Ray Optics>Exercise-1>Q 21

The image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object. Then the distance of the object from the pole,