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The stopping potential for the photo-ele...

The stopping potential for the photo-electrons emitted from a metal surface of work-function 1.7 eV is 10.4 eV. Find the wavelength of the radiation used. Also identify the energy-levels in hydrogen atom which will emit this wavelength.

A

1322.5 Å

B

1022.7 Å

C

1332.9 Å

D

1222.7 Å

Text Solution

Verified by Experts

The correct Answer is:
2
`(hc)/(lambda)=w_(0)+eV_(0).`
`("Where"w_(0)=1.7 ev V_(0)=10.4V)`
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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 2 (C.W)
  1. When a certain metallic surface is illuminated with mono chromatic lig...

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  2. The stopping potential for the photo-electrons emitted from a metal su...

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  3. The threshold frequency of a certain metal is v(0). When frequency of ...

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  4. The kinetic energy of an electron is E when the incident wavelength is...

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  5. The threshold frequency for a metal is 10^(15) Hz. When light of wave...

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  6. When photons of energy hv are incident on the surface of photosensitiv...

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  7. The thereshold wavelenght for a metal of work function W(0) is lambd...

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  8. The number of photoelectrons emitted for light of a frequency v (highe...

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  9. When photons of energy hv fall on an aluminium plate (of work function...

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  10. A photosensitive metallic surface has work funtion hv(0). If photons o...

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  11. The work functions for metals A, B and C are respectively 1.92 eV, 2....

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  12. K.E. of photo electron is E when incident frequency is lambda(1). It ...

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  13. Maximum velocity of photo electrons is 3.5 xx 10^(6) m//s. If the spec...

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  14. Light from a hydrogen discharge tube is made incident on the cathode o...

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  15. Photoelectric emission is observed from a metallic surface for frequen...

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  16. In an experiment on photo- electric effect, stopping potential is 1.0 ...

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  17. The work functions of metals A and B are in the ratio 1 : 2. If light ...

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  18. A particle with rest mass m0 is moving with velocity c. what is the d...

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  19. Photon and electron are given same energy (10^(-20) J). Wavelength ass...

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  20. If an electron and an alpha - particle are accelerated from rest throu...

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