3.2.2.4 - Wave-particle Duality Flashcards
How can you show electrons have wave-like properties?
Electron diffraction.
How can you show electrons have particle like properties?
Photoelectric effect.
De Broglie wavelength =
h / mv
What is momentum?
mv
How are diffraction patterns observed?
When accelerated electrons in a vacuum tube interact with the spaces in a graphite crystal.
In diffraction when is the spread of lines greater?
When the wavelength is greater.
What makes de Broglie wavelength smaller?
Increasing the seed of the electrons.
Describe hypothesis and evaluation?
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.