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calculate the wavelengths of the electronic transition in polyenes for N=6, 8, and 10. Comment on...

calculate the wavelengths of the electronic transition in polyenes for N=6, 8, and 10. Comment on the variation of wavelength with the length of the molecule. Use the equation lambda = hc/delta E = (8meL2c)/(h(N+1)) The answers are 354nm, 490nm, and 626nm I just need to know how to get these answers. Use 5.78x10-10m as the length. Thank you.

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