The work functions for sodium and copper are \[2eV\] and \[4eV\]. Whic – McqOptions

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1.	The work functions for sodium and copper are \[2eV\] and \[4eV\]. Which of them is suitable for a photocell with 4000 Å light [RPET 1999]
A.	Copper
B.	Sodium
C.	Both
D.	Neither of them
Answer» C. Both

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