This is how I went about it but I am unsure if it is correct..(adsbygoogle = window.adsbygoogle || []).push({});

An n=3 to n=1 transition from an electron trapped in a rigid box produces a 240 nm photon. What is the width of the box?

λ = hc / E:

E = hc / λ

E = (1.06E-34 J*s * 3E8m/s) / 240nm

= 1.33E-19 J

E = h2 / 8mL2

L2 = h2 / 8mE

L = √ h2 / 8mE

L = √ ((1.06E-34 J*s) 2 / (8*9.11E-31kg*1.33E-19 J))

= 1.08E-10 m

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# Homework Help: Transitional state of electrons.

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