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The photoelectric work function for a me...

The photoelectric work function for a metal surface is 2.4eV.If a light of wavelength 5000Ais incident on the surface of the metal, find the threshold frequency and incident frequency. Will there be emission of photoelectrons or not?

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CHETANA PUBLICATION-Dual Nature of Radiation and Matter-EXERCISE
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  9. Energy of a photon is 2 eV. Find its frequency and wavelength.

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  11. The energy of a photon is10 xx 10^-19J.Calculate its wavelength.

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