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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 19.4 | De Broglie Wave |
1. What is the wavelength of an electron if its kinetic energy is 5 eV?
Correct Answer: A
2. The kinetic energy of an electron is 4 eV. What is the energy of photon which has the same wavelength to that of this electron?
Correct Answer: C
3. An electronic beam diffracts after passing through an a = 15 μm narrow gap and the diffraction pattern is observed on a fluorescent screen placed at a distance of L = 3 m from the gap. Calculate the width of central maximum if the wavelength of De Broglie wave for electrons is 0.2 nm.
Correct Answer: A
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