Electrons in a certain energy level 
, can emit 3 spectral lines. When they are in another energy level, 
. They can emit 6 spectral lines. The orbital speed of the electrons in the two orbits are in the ratio
A
B
C
D
.
Text Solution
Verified by ExpertsThe correct answer is:
A
Number of emission spectral lines 
, in first case.
or 
or 
. Take positive root.
Again, 
, in second case.
or 
or 
.
Take positive root, or 
Now velocity of electron,
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