An electron is in the fourth excited state (count carefully) in a one-dimensional infinite electron trap of width 2.00 nm. What is the longest wavelength (m) of light that it can absorb? The electron mass is 9.10938×10−31 kg. 5.50×10−7 9.90×10−6 6.67×10−7 3.77×10−6 9.32×10−7 1.47×10−6 1.20×10−6 5.07×10−6 4.21×10−7 2.72×10−6