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An object and a screen are fixed at a di...

An object and a screen are fixed at a distance d apart. When a lens of focal length f is moved between the object and the screen, sharp images of the object are formed on the screen for two positions of the lens.
The magnifications produced at these two positions are `M_(1) "and" M_(2)`-

A

`d gt 2f`

B

`dgt4f`

C

`M_(1)M_(2)= 1`

D

`|M_(1)|- |M_(2)| = 1`

Text Solution

Verified by Experts

The correct Answer is:
C
`m_(1)m_(2) = 1` & `d gt 4` (uv method)
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ALLEN -GEOMETRICAL OPTICS-EXERCISE-2
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  2. A man of height 170cmwants to see his complete image in a plane mirror...

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  3. Two plane mirrors at an angle such that a ray incident on a mirror und...

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  4. If the equation of mirror is given by y= 2//pi "sin"pix (y gt 0 , 0 le...

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  5. In the fig. shown consider the first reflection at the plane mirror an...

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  6. The figure shows a ray incident a angle i=pi//3 of the plot drawn show...

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  7. A ray of light is incident normally on one face of 30^(@) - 60^(@) - 9...

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  8. A curved surface of radius R separates two medium of refractive indice...

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  9. A curved surface of radius R separates two medium of refractive indice...

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  10. A curved surface of radius R separates two medium of refractive indice...

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  11. An object O is kept infront of a converging lens of focal length 30 cm...

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  12. A converging lens of focal length f(1) is placed in front of and coaxi...

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  13. Choose the correct alternative corresponding to the object distance 'u...

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  14. An object and a screen are fixed at a distance d apart. When a lens of...

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  15. A diminished image of an object is to be obtained on a screen 1.0 m fr...

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  16. A convex lens forms an image of an object on a screen. The height of t...

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  17. A ray is incident on the first prism at an angle of incidence of 53^(@...

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  18. For refractin of light through a prism

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  19. Two lenses in contact made of materials with dispersive powers in the ...

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  20. A concave lens is placed in the path of a uniform parallel of beam of ...

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