Atomic StructureHard
Question
Radiation corresponding to the transition n = 4 to n = 2 in hydrogen atoms falls on a certain metal (work function = 2.0 eV). The maximum kinetic energy of the photoelectrons will be :-
Options
A.0.55 eV
B.2.55 eV
C.4.45 eV
D.None
Solution
En = - 
eV;E2 = 
;E4 = 
eV/atom
ᐃE = E4 - E2 = 2.55 eV
Absorbed energy = work function of metal + K.E.
2.55 = 2 + K.E.
K.e. = 0.55 eV
eV;E2 = ;E4 = eV/atomᐃE = E4 - E2 = 2.55 eV
Absorbed energy = work function of metal + K.E.
2.55 = 2 + K.E.
K.e. = 0.55 eV
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