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A radiation of wave length 2500A^(0) is ...

A radiation of wave length `2500A^(0)` is incident on a metal plate whose work function is `3.5eV`. Then the potential required to stop the fastest photo electrons emitted by the surface is `(h=6.63xx10^(-34)Js & c=3xx10^(8)m//s)`

A

1.86V

B

3.00 V

C

1.46 V

D

2.15 V

Text Solution

Verified by Experts

The correct Answer is:
3
`V_(0)e=[(12400)/(lambda(A^(0)))-W_(0)]eV`
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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 1 (C.W)
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  2. The frequency of a photon associated with an energy of 3.31eV is ( giv...

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  3. A radiation of wave length 2500A^(0) is incident on a metal plate whos...

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  4. The work function of a metal is 2.5eV. The maximum kinetic energy of t...

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  5. A metal of work function 2.5 eV is irradiated by light. If the emitted...

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  6. The work function of nickle is 5eV. When light of wavelength 2000A^(0)...

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  7. A photocell is illuminated by a small bright source places 1 m away w...

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  8. The threshold wavelength for a surface having a threshold frequency of...

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  9. Two photons of energies twice and thrice the work function of a metal ...

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  10. The momentum of a photon is 33 xx 10^(- 29) kg - m//sec. Its frequency...

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  11. The energy of a photon of wavelength lambda is given by

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  12. The momentum of a photon is 2 xx 10^(-16) gm - cm//sec. Its energy is

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  13. The rest mass of the photon is

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  14. The momentum of the photon of wavelength 5000 Å will be

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  15. The momentum of a photon of energy will be

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  16. A photon in motion has a mass

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  17. If the momentum of a photon is p, then its frequency is

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  18. A particle of mass 5M at rest decays into two particle of masses 2 m a...

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  19. An electron and a photon have same wavelength of 10^(-9) m. If E is th...

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  20. A proton and an alpha-particle are accelerated through same potential ...

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