Heisenberg uncertainty principle — UPSC CSE 2003 Physics PYQ

(i) Explain what do you understand by Heisenberg uncertainty principle. Using this principle, determine the energy of the ground state of a one dimensional simple harmonic oscillator. (ii) An electron having an energy 2 eV is travelling in the region where V(x) varies as shown below:

Calculate the de Broglie wavelength of the electron in regions I, II and III.