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A paper,with two marks havin separation d,is held normal to the line of sight of an observer at a distance of 50 m.The diamerter of the eye len of he obeserver is 2 mm.the least value of d,so that the marks can be seen as seaarte,will be (The mean wavelength of visible light may be taken as 5000 A )

A

2.125 cm

B

12.5 cm

C

0.125 cm

D

1.225 cm

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. The width of the difraction band varies

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  2. A beam of light of wavelength 600 nm from a distant source falls on a ...

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  3. A paper,with two marks havin separation d,is held normal to the line o...

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  4. The diameter of the objective lens of the telescoe is 5 m and waveelne...

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  5. Diameter of human eye lens is 2 mm.What will be the minimum distance b...

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  6. The fact that ligth is a transverse wave in nature derives irts eviden...

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  7. Light waves are transverse, because they:

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  8. Which one proves transverse nature of waves?

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  9. Which of the following phenomenon shows the transverse nature of light...

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  10. Which one of the following statement is true?

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  11. Which one of the following does not show polarisation?

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  12. Refractive index of a maerial is equal to tangent of polarising angle....

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  13. Polarised light can be produced by

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  14. An unpolarised beam of light of intensity I0 is incident on a combina...

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  15. A ray of ligth is incidentt on a glas plate at an angle of 60^@.What w...

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  16. Light from a denser medium I goes to a rarer medium II.When angle of i...

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  17. Two plane mirrors A and B are aligned parallel to each other ,as shown...

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  18. A point source of light B,placed in front of the centre of a mirror of...

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  19. A student performed the experiment of determining the focal length of ...

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  20. A concave mirror s placed on a horizontal table with its axis directed...

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