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What should be the value of distance d s...

What should be the value of distance d so that final image is formed on the object itself. (Focal length of the lenses are written on the lenses.)

A

`10 cm`

B

`20 cm`

C

`5 cm`

D

none of these

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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-1
  1. An object is placed at a distance u from a concave mirror and its real...

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  2. A real inverted image in a concave mirror represented by graph (u, v, ...

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  3. What should be the value of distance d so that final image is formed o...

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  4. An object is kept on the principal axis of a concave mirror of focal l...

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  5. A biconvex lens is used to project a slide on screen. The slide is 2 c...

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  6. The minimum distance between a real object and its real image formed b...

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  7. Two planoconvex lenses each of the focal length of10cm&refractive inde...

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  8. A plano-convex lens when silvered in the plane side behaves like a con...

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  9. Define: Radius of curvature and centre of curvature

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  10. The focal length of a plano-concave lens is -10 cm , then its focal le...

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  11. A convex lens of focal length 80 cm and a concave lens of focal length...

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  12. The dispersion of light in a medium implies that :

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  13. Critical angle of light passing from glass to air is least for

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  14. A plane glass slab is placed over various coloured letters. The letter...

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  15. A medium has nv = 1.56, nr=1.44. Then its dispersive power is:

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  16. All the listed things below are made of flint glass. Which one of thes...

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  17. Light of wavelenght 4000 A is incident at small angle on a prim of ape...

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  18. A simple microscope has a focal length of 5 cm . The magnification at...

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  19. In a compound microscope, the intermediate image is

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  20. The resolving power of a telesope is more when its objective lens has

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