the presence of an external uniform magnetic field, the normal Zeeman effect is observed
Photon energy E=hυ
In presence of magnetic field 3 spectrum line correspondingPhoton energy
We can written as
E1=E0−μBB
E2=E0
E3=E0+μBB
Now frequency
υ1=υ0−hμBB
υ2=υ0
υ2=υ0+hμBB
hμB=4πme
υ1=υ0−4πmeB(when∆m=−1)
υ2=υ0(when∆m=0)
υ3=υ0+4πmeB(∆m=+1)
We that
ν=λc
ν=400×10−93×108=7.5×10−14Hz
ν1=λ1c
ν1=400×10−9+0.010×10−93×108
ν1=400×10−93×108×1+4000.11
∆ν=7.5×1014(1−2.5×10−5)
∆ν=1.875×1010Hz
B=e4πm∆ν
B=1.06×10−194×3.14×9.1×10−31×1.875×1010=1.34T
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