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The atoms of sample \( A \) after passing of light through it

1. May be in the first excited state
2. May be in the second excited state
3. May be in both first and second excited states
4. None of the above

Correct answer: May be in both first and second excited states

Solution

A sample exposed to light can absorb photons whose energies match different energy gaps. If the light has more than one suitable frequency, some atoms can reach the first excited state while others can reach the second excited state.

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