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Work function of zinc is twice that of s...

Work function of zinc is twice that of sodium. If the photoelectric threshold wavelength for sodium is `7000 Å`, what will be its vaue for zinc?

A

`3500 Å`

B

`14000 Å`

C

`10500 Å`

D

`4667 Å`

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The correct Answer is:
A
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CHHAYA PUBLICATION-QUANTUM THEORY-Exercise (Multiple Choice Questions)
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  10. The momentum of a photon (frequency = f, rest mass = 0) is

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  11. A monochromatic radiation of wavelength lamda and intensity I is incid...

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  12. The threshold frequency for a photosensitive metal is 3.3 xx 10^(14) H...

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  13. The anode voltage of a photocell is kept fixed. The wavelength lamda o...

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  14. A body of mass 60g is moving with a velocity of 10 m.s^(-1). The de Br...

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  15. If the de Broglie wavelength of a gas molecule at 0^(@)C be lamda, wha...

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  16. Two moving electrons have a ratio of 1 : 2 between their respective ki...

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  17. An electron is accelerated by a photential difference V and as a resul...

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  19. The wavelength of a light is 0.01 Å. If h be the Planck's constant, th...

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