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The work function of a metal is 2.5eV. T...

The work function of a metal is `2.5eV`. The maximum kinetic energy of the photoelectrons emitted if a photon of wavelength `3000A^(0)` falls on it is `(h=6.63xx10^(-34)Js & c=3xx10^(8)m//s)`

A

`1.12 xx 10^(-19) j`

B

`4.8 xx 10^(-19) j`

C

`9.6 xx 10^(-19) j`

D

`2.6 xx 10^(-19) j`

Text Solution

Verified by Experts

The correct Answer is:
4
`K.E.=[(12400)/(lambda(A^(0)))-W]eV`
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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 1 (C.W)
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  2. A radiation of wave length 2500A^(0) is incident on a metal plate whos...

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

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

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

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

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

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

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

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

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

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  12. The rest mass of the photon is

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

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  14. The momentum of a photon of energy will be

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  15. A photon in motion has a mass

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

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

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

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

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

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