Question

what causes the splitting of energy levels in a magnetic field​

Answer 1

In a magnetic field, the splitting of energy levels is caused by The Paschen–Back effect.

What is The Paschen–Back effect?

• In The Paschen–Back effect, a spectral line splits up into many components of energy known as quantum.
• This splitting up of energy takes place in the presence of a strong magnetic field.
• A strong magnetic field from an outside source disrupts the spinning angular momentum of the atoms thus causing energy split up.

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