Assertion :Spliting of spectral lines takes place when the source giving the spectrum is placed in a magnetic field. Reason: In the presence of magnetic field,the orbitals present in a sub-shell(which were degenerate)take up different orientations. In other words, degeneracy is broken and splitting of spectral lines takes place.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In the presence of magnetic field,the orbitals present in a sub-shell (which were degenerate) take up different orientations. In other words,degeneracy is broken and splitting of spectral lines takes place.

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