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A person is six feet tall.How tall must ...

A person is six feet tall.How tall must a vertical mirror be,if he is able to see his entire length?

A

6 ft

B

4.5 ft

C

7.5 ft

D

3 ft.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. When an unpolarised light intensity I0 is incident on a polarising she...

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  2. Ray optics is valid,when characteristic dimenstions are

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  3. A person is six feet tall.How tall must a vertical mirror be,if he is ...

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  4. A beam of monochromatic light is refracted from vacuum into a medium o...

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  5. Green light of wavelegth5,460 overset @A is incident on an air-glass i...

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  6. The frequency of ligth in a material is 2 xx 10^(14) Hz and wavelength...

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  7. A ray of light travelling in air have wavelength lambda,frequency v,ve...

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  8. The refractive index of water is 1.33.What will be the speed of light ...

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  9. Light travels through a glass plate of thickness t and having a refrac...

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  10. If imuj represents refractive index,when a light ray goes from medium ...

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  11. The refractive index of air w.r.t. med 1 is 6//7.The refractive index ...

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  12. A microscope is focussed ona mark on a piece of paper then a slab of g...

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  13. A transparent cube of side 210 mm contains a small air bubble. Its app...

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  14. A ray of light travelling in a transparent medium of refractie index m...

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  15. Velocity of light in a liquid is 1.5 xx 10^8 ms^(-1) and in air,it is ...

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  16. Name the physical principle on which th eworking of potical fibres is ...

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  17. A plano-convex lens is made of refractive index 1.6.If the radius of c...

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  18. Focal length of a convex lens of refractive index 1.5 is 2 cm.Focal le...

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  19. A convex lens is dipped in a liquid,whose refrctive index is equal to ...

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  20. A lens is placed between a souce of light and a wall.It forms images o...

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