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## Homework Statement

The potential-energy function U(x) has the constant value U_0 in the interval 0 < x < L and is zero outside this interval. An electron is moving past this square barrier, but the energy of the electron is greater than the barrier height.

If E= 6 U_0, what is the ratio of the de Broglie wavelength of the electron in the region x > L to the wavelength for 0 < x < L?

## Homework Equations

λ=h/p= h/ sqrt(2mK)

## The Attempt at a Solution

K are for x>L and K are for 0<x<L

lamda1 / lambda 2 = sqrt(K2) / sqrt (K1) = sqrt (U_0) / sqrt (6U_0) = 1/ sqrt(6)

anyone.. please help me to spot the mistakes.. :(