What Energy Is Needed to Reach the 3rd Excited State in an Infinite 1-D Well?

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SUMMARY

The energy required to transition a particle from the ground state (n=1) to the third excited state (n=4) in an infinite one-dimensional well is calculated using the formula En = n²π²ħ²/(2mL²). Given that the ground state energy is 1.26 eV, the energy for the third excited state can be determined by calculating the difference between E4 and E1. The constants used include m = 9.11E-31 kg and ħ = h/2π, leading to a precise calculation of the energy levels.

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Homework Statement


If a particle (infinite 1-D well) in ground state n =1 with an energy 1.26 eV above E=0. Whats the energy needed to get it to 3rd excited state n =4?

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The Attempt at a Solution


any hints?
 
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Im thinking En = h2kn2/(2m) or En = n2π2ħ2/(2mL2)?
 
m= 9.11E-31kg
ħ=h/2pi
a=(pi2 ħ2/E2m)*12
a=1.66E-34/2.3E-30
a= 7.22E-5eV

I tried this
 

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