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Two photons, each of energy 2.5 eV are s...

Two photons, each of energy 2.5 eV are simultaneously incident on the metal surface. If the work function of the metal is 4.5 eV, then from the surface of metal

A

one electron is emitted

B

two electron are emitted

C

no electron is emitted

D

more than two electrons are emitted

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The correct Answer is:
C
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE-1 (OBJECTIVE QUESTIONS)
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  2. Energy of a photon is 20 eV then its momentum is

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  3. Two photons, each of energy 2.5 eV are simultaneously incident on the ...

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  6. The equation E=pc is valid

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  7. The wavelength of a spectral line is 4000 Å. Calculate its frequency a...

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  8. A surface ejects electrons when illuminated by blue light but none wit...

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  9. Electrons of 0.5 eV energy are emitted from a metal surface when ...

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  10. Which metal will be suitable for a photo electric cell using light...

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  11. An electromagnetic radiation of frequency 3xx10^(15) cycles per second...

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  12. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

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  13. Two differenct photons of energies, 1 eV and 2.5 eV, fall on two ...

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  14. The KE of the photoelectrons is E when the incident wavelength is (lam...

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  15. The threshold wavelength of tungsten is 2300 Å. If ultra voile...

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  16. If the frequency of light in a photoelectric experiment is doubled the...

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  17. The stopping potential for photo electrons does not depend on

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  18. The work function for the surface of aluminium is 4.2 eV. What will be...

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  19. Light of wavelength 3320 Å incidents on metal surface (work fun...

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  20. Using light of wavelength 6000 Å stopping potential is obtained ...

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