Work function of a metal is 2.1 eV. Which of the waves of the followin – McqOptions

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1.	Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface [Bihar MEE 1995]
A.	4000 Å, 7500 Å
B.	5500 Å, 6000 Å
C.	4000 Å, 6000 Å
D.	None of these
Answer» E.

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