Question #1bc59

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Question #1bc59

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Answer 1 · 2017-01-16T21:53:55

It means that the light must be absorbed or emitted as a single quantum of energy.

Explanation:

For example, the difference between the $n = 2$ $n = 2$ and $n = 3$ $n = 3$ levels in the hydrogen atom is $3.03 \times 10^{-19} l J$ $3.03 × 10^"-19" color(white)(l)"J"$ .

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If an electron drops from level 3 to level 2, the energy must be emitted as a single quantum with energy $3.03 \times 10^{-19} l J$ $3.03 × 10^"-19" color(white)(l)"J"$ .

The energy will not be emitted as two quanta with energies $2.00 \times 10^{-19} l J$ $2.00 × 10^"-19" color(white)(l)"J"$ and $1.03 \times 10^{-19} l J$ $1.03 × 10^"-19" color(white)(l)"J"$ or any other combination of energies.

If an electron jumps from level 2 to level 3, it must absorb a single quantum with energy $3.03 \times 10^{-19} l J$ $3.03 × 10^"-19" color(white)(l)"J"$ .

It will not absorb two quanta with energies $1.00 \times 10^{-19} l J$ $1.00 × 10^"-19" color(white)(l)"J"$ and $2.03 \times 10^{-19} l J$ $2.03 × 10^"-19" color(white)(l)"J"$ or any other combination of energies.

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Question #1bc59

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