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Monochromatic light of frequency 6 xx 10...

Monochromatic light of frequency `6 xx 10^(14) Hz ` is produced by a LASER .the power emitted is `2 xx 10^(-3)W`.The number of phtotons smitted,on the average ,by the source per second is

A

`5 xx 10^(14)`

B

`5 xx 10^(15)`

C

`5 xx 10^(16)`

D

`5 xx 10^(17)`.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. If a phtoton has velocity c and frequency v ,then wchich of the follow...

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  2. The mass of photon at rest is:

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  3. Monochromatic light of frequency 6 xx 10^(14) Hz is produced by a LAS...

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  4. Which one among the following shows particle nature of ligth?

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  5. The energy of a photon of light is 3 eV.Then,the wavelength of photon ...

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

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

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

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

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

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

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

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

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  14. As the intensity of incident light incrases:

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  15. Which of the following statements is correct?

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

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

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

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

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

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