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What is the required energy for photon absorption by quantum state 2 of a silicon quantum...

What is the required energy for photon absorption by quantum state 2 of a silicon quantum dot of size 2.1 nm

The band gap of Si is 1.12eV

The electron effective mass correction factor is 0.46

The hole effective mass correction factor is 0.56

Give your answer in eV to 3 decimal place.

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