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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 ¹D₂ â†’ 5 ¹P₁ of cadmium atoms is to be observed. The spectrometer has a resolution of 0.01 nm. The minimum magnetic field needed to observe this is

(m_e = 9.1 * 10^-31 kg, e = 1.6 * 10^-19C, c = 3 * 10⁸ m/s)

0.26 T

0.52 T

2.6 T

5.2 T

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