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A particle in a potential well is in the n=5quantum state. How many peaks are in the probability densityPx=ฯˆx2 ?

Short Answer

Expert verified

There are five peaks in the probability density Px=ฯˆx2.

Step by step solution

01

Given Information 

We have to given potential well is in the n=5quantum state, the probability density isPx=ฯˆx2.

02

Simplify

We know that the particle in a potential well is the n=5quantum state.

Now, find, how many peaks are in the probability density:

Px=ฯˆx2

therefore, the answer is five.

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Most popular questions from this chapter

An electron has a 0.0100 probability (a 1.00% chance) of tunneling through a potential barrier. If the width of the barrier is doubled, will the tunneling probability be0.0050,0.0025or0.0001? Explain.

Figure 40.27a modeled a hydrogen atom as a finite potential well with rectangular edges. A more realistic model of a hydrogen atom, although still a one-dimensional model, would be the electron + proton electrostatic potential energy in one dimension:

U(x)=-e24ฯ€ฮต0x

a. Draw a graph of U(x) versus x. Center your graph at x=0.

b. Despite the divergence at x=0, the Schrรถdinger equation can be solved to find energy levels and wave functions for the electron in this potential. Draw a horizontal line across your graph of part a about one-third of the way from the bottom to the top. Label this line E2, then, on this line, sketch a plausible graph of the n=2wave function.

c. Redraw your graph of part a and add a horizontal line about two-thirds of the way from the bottom to the top. Label this line E3, then, on this line, sketch a plausible graph of the n=3 wave function.

Model an atom as an electron in a rigid box of length 0.100nm, roughly twice the Bohr radius.

a. What are the four lowest energy levels of the electron?

b. Calculate all the wavelengths that would be seen in the emission spectrum of this atom due to quantum jumps between these four energy levels. Give each wavelength a label ฮปnโ†’mto indicate the transition.

c. Are these wavelengths in the infrared, visible, or ultraviolet portion of the spectrum?

d. The stationary states of the Bohr hydrogen atom have negative energies. The stationary states of this model of the atom have positive energies. Is this a physically significant difference? Explain.

e. Compare this model of an atom to the Bohr hydrogen atom. In what ways are the two models similar? Other than the signs of the energy levels, in what ways are they different?

a. Derive an expression for ฮป2โ†’1, the wavelength of light emitted by a particle in a rigid box during a quantum jump from n=2ton=1.

b. In what length rigid box will an electron undergoing a 2โ†’1 transition emit light with a wavelength of 694nm? This is the wavelength of a ruby laser

Two adjacent energy levels of an electron in a harmonic potential well are known to be 2.0eV and 2.8eV. What is the spring constant of the potential well?

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