1. Quiz_18 Previous material – H atom, laser, blackbody radiation New material – QM wavefunction
Physics 274
10/13/2016

2. In order for a proton to have the same momentum as an electron,
Q.1
In order for a proton to have the same momentum as an electron,
A. the proton must have a shorter de Broglie wavelength than the electron.
B. the proton must have a longer de Broglie wavelength than the electron.
C. the proton must have the same de Broglie wavelength as the electron.
D. not enough information given to decide
C lambda = h//p

3. Which of the following statements is correct?
Q.2
Which of the following statements is correct?
Spontaneous emission emits photons in random directions at random times
Stimulated emission emits photons in random directions and random times
Both spontaneous emission and stimulated emission emit photons in random directions and random times
Both spontaneous emission and stimulated emission emit photons in the same direction. A

4. It radiates more high frequency photons
As you increase the temperature of a blackbody, which of the following statements is true?
It radiates more high frequency photons
It radiates fewer high frequency photons.
Its radiation spectrum is independent of temperature.
I(λ)~λ4 A

5. Q.4
According to quantum theory, which of the following statements is true?
The wavefunction Ψ(x,t) determines the position of a particle at location x and time t.
The wavefunction Ψ(x,t) is real and gives the probability of finding the particle at location x and time t.
The wavefunction is complex and |Ψ(x,t)|2dx gives the probability of finding the particle between location x and x+dx at time t.
The wavefunction is complex and |dΨ(x,t)/dt|2dx gives the probability of finding the particle between location x and x+dx at time t. C