Your roommate is taking Newtonian physics, while you’ve moved on to quantum mechanics. He claims that QM can’t be right, because he didn’t see any evidence of quantized energy levels in a mass–spring harmonic oscillator experiment. You reply by calculating the spacing between energy levels of this system, which consists of a 1-g mass on a spring with k = 80 N/m. What is that spacing, and how does this help your argument?