(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A particle is in the ground state of the harmonic oscillator with classical frequency w, when suddenly the spring constant quadruples, so w'=2w, without initially changing the wave function. What is the probability that a measurement of the energy would still return the value hw/2? What is the probability of getting hw?

2. Relevant equations

3. The attempt at a solutionI know that |c_n|^2 tell us the probability that a measurement will give energy E_n. But in this case i kind of don't know where to start.

So, if you could give me some direction, i would appreciate it.

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# Homework Help: Quantum Mechanics. Help!

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