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  4. In the figure six lines of emission spectrum are shown. Which of them will be absent in the absorbtion spectrum.

Q. In the figure six lines of emission spectrum are shown. Which of them will be absent in the absorbtion spectrum.

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Solution:

The photon's with energies equal to that required for upward transition and would be absorbed, hence only lines 1,2 and 3 will be present in absorption spectrum.

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