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A metal surface is illuminated by the pr...

A metal surface is illuminated by the protons of energy 5 eV and 2.5 eV respectively . The ratio of their wavelength is

A

`1 : 3`

B

`1 : 4`

C

`1 : 2`

D

`2 :1`

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The correct Answer is:
C
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NIKITA PUBLICATION-ELECTRONS AND PHOTONS -MCQs
  1. A photon in motion has a mass

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  2. The energy radiated from a source is in the form of

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  3. A metal surface is illuminated by the protons of energy 5 eV and 2.5 e...

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

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  5. The work function of a substance is 1.6 eV. The longest wavelength of ...

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  6. The momentum of moving particle is p . The wavelength lambda of the as...

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  7. Which of the following is incorrect statement regarding photon

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  8. What is the energy , in joule , associated with a photon of wavelength...

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  9. If a photon has velocity c and frequency v , then which of the followi...

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  10. The kinetic mass of a photon is given by

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  11. The number of photons required to give a definite energy W varies

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  12. A quantum of light energy is called

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  13. It is essential to consider light as a stream of photons to explain

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  14. What is the momentum of a photon of frequency v ?

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  15. The kinetic energy (E(k)) of a photoelectron varies with the frequency...

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  16. If the energy of a photon corresponding to a wavelength of 6000 Å is 3...

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  17. Wavelength of a 1 ke V photon is 1.24 xx 10^(-9) m. What is the freque...

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  18. The dual nature of matter was predicted by

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  19. The wavelength of an electron , moving with the velocity 3 xx 10^(3) ...

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  20. If we consider electrons and photons of same wavelength , then they wi...

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