Prb:Yellow light emitted from a sodium lamp has a
wavelength of 580nm.Calculate the frequency of the
yellow light. (1nm=1x10m) (c = 3x 10ms)
I
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Answer:
The wavelength of yellow light is 580nm = 580×10
−9
m.
The frequency of yellow light,
ν=
λ
c
=
580×10
−9
m
3.0×10
8
m/s
=5.17×10
14
/s.
The wave number of yellow light,
ν
ˉ
=
λ
1
=
580×10
−9
m
1
=1.72×10
6
/m
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