Question 1
Which of the following is evidence for the wave nature of electrons?
Electron diffraction from crystals
The photoelectric effect
Continuous energy spectrum in β– decay
Pair production
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DP IB Physics: HL
Topic Questions
12.1 The Interaction of Matter with Radiation
Question 2
Which of the following experiments provides evidence for the particle nature of light?
Gamma decay
Young's double slit
The photoelectric effect
Electron diffraction
Question 3
According to the de Broglie equation, the wavelength of the electron is
directly proportional to the mass of the electron
inversely proportional to the square of the velocity of the electron
directly proportional to the velocity of the electron
inversely proportional to the mass of the electron
Question 4
Which expression states the minimum energy of a photon before undergoing pair production?
mc2
2mc2
mc23mc2
Question 5
As a consequence of the uncertainty principle, which two quantities cannot be known at the same time?
Energy and momentum
Position and energy
Energy and time
Time and momentum
Question 6
Which of the following statements about quantum tunnelling is incorrect?
Increasing the barrier length decreases the effect of tunnelling probability
The wavefunction can travel through a finite barrier
The probability of finding a particle in a particular region is its wavefunction squared
The wavefunction can travel through an infinite barrier
Question 7
Which graph has a gradient equal to hc?
Question 8
Which of the following metals will exhibit the photoelectric effect most readily?
|
metal |
work function / eV |
|
|
A |
sodium |
2.3 |
|
B |
caesium |
2.1 |
|
C |
calcium |
2.9 |
|
D |
silver |
4.3 |
Question 9
Three statements about the wavefunction are
- It is normalised
- The square of the wavefunction gives the probability of finding the particle in that region
- The wavefunction is equal to 1 outside an infinite square well
Which of the statement(s) are true?
I and III
I and II
II and III
II only
Question 10
Identify the electron with the lowest uncertainty in momentum.
