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

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?

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.

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.

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.

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.

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?

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.