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The work function (phi) of some metals i...

The work function `(phi)` of some metals is listed below . The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is :

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The correct Answer is:
4
Incident radiation energy is 4.13 ev Condition: `E gt E_(0)`
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The work function (phi) of some metals is listed can have principal quantum of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is Metal Li Na K Mg Cu Ag Fe Pt W phi(eV) 2.4 2.3 2.2 3.7 4.8 4.3 4.7 6.3 4.75

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