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In a normal Zeeman Effect experiment, spectral splitting of the line at the wavelength
643.8 nm corresponding to the transition 5'D, → 5'P, of cadmium atoms is to be
observed. The spectrometer has a resolution of 0.01 nm. Minimum magnetic field needed
to observe this is (m. = 9.1x10-' kg,e =1.6x-19 C,c = 3×10° m/s)
-31
(а) 0.26T
(b) 0.527
(c) 2.6T
(d) 5.27

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