Photoelectric EffectHard
Question
If the frequency of Kα X-ray emitted from element with atomic number 31 is f, then the frequency of Kα X-ray emitted from the element with atomic number 51 would be (assume that screening constant for Kα is 1) :
Options
A.
f
fB.
f
fC.
f
fD.
f
fSolution
hf = 13.6(Z − 1)2 . 
= 13.6 ×
(31 − 1)2
hf′ = 13.6 ×
(51 − 1)2
⇒
⇒ f′ = f
= 13.6 ×
(31 − 1)2hf′ = 13.6 ×
(51 − 1)2⇒
⇒ f′ = fCreate a free account to view solution
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