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The work function (F) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300nm wavelength falls on the metal is : li=2.4 Na=2.3 K=2.2 Mg=3.7

The work function (F) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300nm wavelength falls on the metal is :
li=2.4
Na=2.3
K=2.2
Mg=3.7

Grade:11

1 Answers

Arun
25763 Points
2 years ago
Dear student
 
Energy of photon = hc/ lambda = 4.14 eV
 
Now Li, Na, K, Mg have work function less than 4.14 eV
hence these will show photoelectric effect

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