13.1-13.4 Photons Wave Particle Duality Quizlet Cards Flashcards
What determines the energy of a photon?
The frequency/wavelength
What is a photon?
A quantum of energy of electromagnetic radiation
How do you calculate the energy of a photon?
E = hf OR E =hc/λ
What is an electron volt?
The energy gained or lost by an electron passing through a potential difference of 1V
How do convert from eV to J?
multiply by 1.6x10^-19
How do convert from J to eV?
divide by 1.6x10^-19
What is the threshold p.d. of an LED?
The minimum potential difference required for the LED to produce light.
How can the threshold p.d. of an LED be used to find photon energy?
The energy transferred by the electrons (e x V) is equal to the energy of the photons produced (hf).
What is meant by wave particle duality?
It describes how all matter can display both wave and particle properties.
What is the key piece of evidence for wave particle duality?
When an electron beam passes through polycrystalline graphite it produces a diffraction and interference pattern pattern.
What does the De Broglie wave equation apply to?
Everything
What is the relationship between momentum and wavelength?
Inverse proportionality
