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Wavelengths of Matter Ranking Task

The following objects move at the speed v.

Rank these objects on the basis of their wavelength. Rank from largest to smallest. To rank items as equivalent, overlap them.

1: Red light - v=c
2: Photon - v=0.01c
3: Electron - v=0.01c
4: Baseball - 41m/s
5: Car - 27m/s
6: Person - 4.5m/s

Problem 34.31

A proton and an electron have the same de Broglie wavelength.

How do their speeds compare, assuming both are much less than that of light?

Problem 34.54

Part A: Find the energy of the highest energy photon that can be emitted as the electron jumps between two adjacent allowed energy levels in the Bohr hydrogen atom.

Part B:
Which energy levels are involved? Enter your answers numerically separated by a comma.

Problem 34.36

An electron is moving in the +x direction with speed measured at 2.5×107 m/s, to an accuracy of +/- 10%.

What is the minimum uncertainty in its position? Express your answer using two significant figures.

Problem 34.32

Part A: Find the de Broglie wavelength of electrons with kinetic energies of 10 . Express your answer using two significant figures.

Part B: Find the de Broglie wavelength of electrons with kinetic energies of 3.0 . Express your answer using two significant figures.

Part C: Find the de Broglie wavelength of electrons with kinetic energies of 40 . Express your answer using two significant figures.

Problem 34.46

The stopping potential in a photoelectric experiment is 1.9 V when the illuminating radiation has wavelength 365 nm.

Part A: What is the work function of the emitting surface? Express your answer using two significant figures.

Part B: What would be the stopping potential for 280-nm radiation? Express your answer using two significant figures.

Problem 34.58

A hydrogen atom is in its ground state when its electron absorbs 44eV  in an interaction with a photon.

What is the energy of the resulting free electron?

Problem 35.34

An electron is trapped in an infinite square well 30nm  wide. Find the wavelengths of the photons emitted in these transitions:

Part A: n=2 to n=1; Express your answer using two significant figures.

Part B: n=20 to n=19; Express your answer using two significant figures.

Part C: n=100 to n=1; Express your answer using two significant figures.