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The 'f number' of a given camera is 8.It...

The 'f number' of a given camera is 8.It means that

A

the diamater of the stop of the camera is 0.08 m.

B

the focal length of the lens of the camera is 8.0 m.

C

the diameter of the stop is 0.125 of the focal length of the lens

D

none of the above.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. The focal length of the objective of a microscope is

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  2. When the length of a microscope tube is increased,its magnifying power

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  3. The 'f number' of a given camera is 8.It means that

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  4. The interfernce phenomenon can take place

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  5. Two waves of intensities I and 4 I superimpose, then maximum and minim...

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  6. Two beams of light having intensities I and 4 I interfere to produce a...

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  7. The contrast in the fringes in any interference pattern depends on

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  8. For constructive interfrence to take place between two monochromatic l...

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  9. In Young's double slit experiment,the sepaation between the slit is ha...

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  10. In a Young's double slit experiment,12 fringes are observed to be form...

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  11. In the Young's double slit experiment,the interference pattern is foun...

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  12. in a double slit experiment,instead of taking slits of equal widths,on...

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  13. In a Young's double slit experiment,the separation betwen the two slit...

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  14. in a Youing's double slit experiment,bicromatic light of wavelengths 4...

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  15. In a two-slit experiment with monochromatic light, fringes are obtaine...

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  16. In an ideal double slit experiment when a glass plate having refractiv...

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  17. A beam of electrons is used in an Young's double slit experiment.The s...

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  18. A thin slice is cut out of a glass cylinder along a plane parallel to ...

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  19. In the adjacent diagram, CP represents a wavefront and AO & BP, the co...

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  20. Yellow light is used in a single slit diffraction experiment with slit...

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