The threshold wavelength of the tungsten is 2300 If ultraviolet light – McqOptions

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1.	The threshold wavelength of the tungsten is 2300 If ultraviolet light of wavelength \[1800\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\] is incident on it, then the maximum kinetic energy of photoelectrons would be about
A.	1.49eV
B.	2.2eV
C.	3.0eV
D.	5.0eV
Answer» B. 2.2eV

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