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Home / Doubts and Solutions/JEE/Physics

ACCORDING TO THE MOSELEY'S LAW THE RATIO OF THE SLOPES OF THE GRAPH BETWEEN SQ. ROOT OF FREQUENCY AND Z FOR Kb NAD Ka IS
 
 
 
 
PLS GIVE THE ANSWER..

Asked by sudheerkapoor67 10th October 2017, 9:54 AM
Answered by Expert
Answer:
Moseley's law for frequency of X-ray is given by square root of nu space equals space square root of c R open parentheses fraction numerator 1 over denominator n subscript 1 superscript 2 end fraction space minus space fraction numerator 1 over denominator n subscript 2 superscript 2 end fraction close parentheses end root space open parentheses Z minus b close parentheses
for K-series b =1. for Kα  line n1 = 1 and n2 = 2 ; for Kβ  line n1 = 1 and n2 = 3.
 
For Kα line the slope is square root of c R 3 over 4 end root and for Kβ line the slope is square root of c R 8 over 9 end root
Hence the ratio of slope of Kβ line to that of Kα line is square root of 8 over 9 cross times 4 over 3 end root space equals space square root of 32 over 27 end root space equals space 1.089
Answered by Expert 11th October 2017, 2:35 PM
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