Modern Physics - Question 2 An electron is confined inside a quantum dot, which for this question can be approximated as a one-dimensional quantum box with rigid walls. The ground state has an energy of 0.042 eV. (a) In your own words, explain why the energy of the ground state of the system is larger than zero. (b) Calculate the length of the quantum dot. (c) What wavelength of photon is needed to cause a transition to the next excited state? (d) Is the wavelength of 2.958 um observed in the spectrum of the quantum dot? Explain your answer.