1.

In Bohr model of hydrogen atom, the ratio of periods of revolution of an electron in \[n=2\] and \[n=1\] orbits is [EAMCET (Engg.) 2000]       

A.   2 : 1  
B.   4 : 1
C.   8 : 1  
D.   16 : 1
Answer» D.   16 : 1


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