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A film projector magnifies a 100 cm^2 fi...

A film projector magnifies a `100 cm^2` film strip on a screen.If the linear magnification is 4,the area of the magnified film on teh screen is

A

`1,600 cm^2`

B

`400 cm^2`

C

`800 cm^2`

D

`200 cm^2`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. The graph drawn with object distance along abbscissa and image distanc...

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  2. Two plane -convex lenses,each having focal length of 0.4 m,are pressed...

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  3. A film projector magnifies a 100 cm^2 film strip on a screen.If the li...

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  4. In order to include the effect of thickness t of the lens,following f...

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  5. A beam of light is incident on a convex lens parallel to its principal...

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  6. The plane face of the plano-convex lens of focal length 20 cm is silve...

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  7. A lens having focal length f and aperture of diameter d//2 in the cent...

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  8. A beam of parallel rays is brought to focus by a plano-convex lens.A ...

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  9. Large aperture of lens results in

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  10. The spherical abberation in a lens may be inimised by designing of th...

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  11. A glass prism placed in a homogeneous transparent medium will deivatie...

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  12. Angle of minimum deviation for a prism of refractive index 1.5 is equa...

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  13. Yellow light is refracted through a prism producing minimum deviation ...

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  14. The figures represent three cases of ray passing through a prism of re...

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  15. The refracting angle of a prism is A and the refractive index of its m...

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  16. A prism splits a beam of white ligth into its seven constituent colour...

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  17. A narrow beam fo white ligth passes throuugh a glass slab havig paral...

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  18. Refractive indices of a prism material for two wavelengths are 1.66 an...

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  19. When a glass prism is placed inside water,its dispersive power

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  20. During dispersion of white light by prism placed in air,

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