I found the following question in a question paper. If the potential experienced by a particle in one dimension is given by [tex]ax^4[/tex], how does the energy of the particle depend on the parameter a? Use Bohr-Sommerfeld quantisation formula.. I know how to find the dependence of energy on n, the integer that occurs in the quantisation. But how does it depend on a? Since Hamiltonian is [tex]\ K+V[/tex] , Energy is [tex]\ K+ax^4[/tex]. I dont know what else I can say.