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Monochromatic light of wavelength 667 nm...

Monochromatic light of wavelength 667 nm is produced by a helium neon laser.The power emitted in 9m W.The number of phototns arriving per second on the average at a target irradiated by this beam is

A

`3 xx 10^(16) `

B

`3 xx 1^(19)`

C

`9 xx 10^(15)`

D

`9 xx 10^(17)`.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. The energy of a photon of light is 3 eV.Then,the wavelength of photon ...

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  2. A source S1 is producing 10^(15) photons s^(-1) of wavelength 5,000 ov...

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  3. Monochromatic light of wavelength 667 nm is produced by a helium neon ...

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  4. The photoelectric work function for a metal surface is 4.125 eV.The cu...

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  5. The work functins for metals,A ,B and C are 1.92 eV,2 eV and 5 eV reps...

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  6. When ultraviolet rays are incident on a metal plate,the photoelectric ...

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  7. A photocell is illuminated by a small bright source placed 1 m away .w...

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  8. A photoelectric cell is illuinated by a point source of light 1 m away...

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  9. A 5 W source emits monochromatic light of wavelength 5,00 overset @A.W...

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  10. As the intensity of incident light incrases:

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  11. Which of the following statements is correct?

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  12. The number of photoelectrons emited for a light of a freqeuency v (hig...

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  13. When monochromatic radition of intensity I falls on a metal surface,th...

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  14. The cathode of a photoelectric cell is hanged,such that the work func...

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  15. Einstien's work on photoelectric effect given support to:

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  16. When photons of energy h v fall on an aluminium plate (of work functio...

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  17. The work function of a surface of a phototsensitve materil is 6.2 eV.T...

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  18. Light of wavleength 5,000 overset @A falls on a photo sensitive plate ...

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  19. Photoelectric work function of a metal is 1 eV.Light of wavelength l...

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  20. The figure shows a plot of photocurrent versus anode potential for a p...

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