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The photoelectric emission from a surfac...

The photoelectric emission from a surface starts only when the light incident upon the surface has certain minimum:

A

intensity

B

wavelength

C

Frequency

D

velocity

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The correct Answer is:
C
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NARENDRA AWASTHI-ATOMIC STUCTURE-Exercise
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  2. According to Einstein's photoelectric equation, the graph between kine...

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  3. The photoelectric emission from a surface starts only when the light i...

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  4. If lamdao and lamda be the threshold wavelength and wavelength of inci...

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  5. A light source of wavelength lambda illuminates a metal and ejects pho...

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  6. Electronmagnetic radiations having lambda=310Åare subjected to a metal...

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  7. The ratio of slopes of K(max) vs. V and V(0) vs. v curves in the photo...

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  8. Radiation corresponding to the transition n=4 to n=2 in hydrogen atoms...

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  9. Select the incorrect statement.

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  10. Which is the de-Broglie equation?

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  11. Which of the following has the largest de Broglie wavelength (all have...

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  12. The de-Broglie wavelength associated with a particle of mass 10^-6 kg ...

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  13. For two particles A and B, curves are plotted sqrtV against de-Broglie...

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  14. Which of following graphs correctly represents the variation of partic...

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  15. An excited state of H atom emits a photon of wavelength lamda and retu...

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  16. A dye absorbs a photon of wavelength lambda and re- emits the same ene...

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  17. Be^(3+) and a proton are accelerated by the same potential, their de-...

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  18. de Broglie wavelength of an electron after being accelerated by a pote...

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  19. An electron travels with a velocity of x ms^(-1). For a proton to have...

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  20. The momentum ("in" kg-m//s) of photon having 6 MeV energy is :

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