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Threshold wavelength for photoelectric e...

Threshold wavelength for photoelectric effect on sodium is `5000 Å` . Its work function is

A

15 J

B

`16 xx 10^(-14) J`

C

`4 xx 10^(-19) J`

D

`4 xx 10^(-18) J`

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The correct Answer is:
C
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NIKITA PUBLICATION-ELECTRONS AND PHOTONS -MCQs
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  9. The stopping potential for acertain photosensitive metal is Vq when th...

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  10. Einsteins photoelectric equation is

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  11. In photoelectric effect when photons of energy hv fall on a photosensi...

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  12. Einstein's photoelectric equation states that E(k) = h v - phi . In th...

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  13. Radiations of two photon’s energy, twice and ten times the work functi...

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  14. If ultraviolet radiation of 6.2 eV falls of an aluminium surface , the...

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  15. Light of wavelength 3 xx 10^(-7) m is incident on a photosensitive sur...

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  17. The energy of incident radiation, which emits the electrons with a vel...

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  18. An electron of work function 1.4 eV is emitted with a velocity 5 xx 10...

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  19. The photoelectron of work function 3.1 eV is emitted with velocity 2.5...

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  20. When an inert gas is filled in the place vacuum in a photo cell , then

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