3.2.2.4 - Wave-particle Duality Flashcards
1
Q
How can you show electrons have wave-like properties?
A
Electron diffraction.
2
Q
How can you show electrons have particle like properties?
A
Photoelectric effect.
3
Q
De Broglie wavelength =
A
h / mv
4
Q
What is momentum?
A
mv
5
Q
How are diffraction patterns observed?
A
When accelerated electrons in a vacuum tube interact with the spaces in a graphite crystal.
6
Q
In diffraction when is the spread of lines greater?
A
When the wavelength is greater.
7
Q
What makes de Broglie wavelength smaller?
A
Increasing the seed of the electrons.
8
Q
Describe hypothesis and evaluation?
A
When things are hypothesised other scientists have to evaluate the theory by a process known as peer review before it is published. It is then tested with experiments.
