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Grade 11AIPMT

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

Profile image of liza
7 Years agoGrade 11
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1 Answer

Profile image of Arun
ApprovedApproved Tutor Answer7 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