Photoelectric Effect Flashcards
What is the photoelectric effect?
electrically charged particles are released from a material when it absorbs EM radiation
ejecting electrons from a metal surface by shining a specific light for the event to happen
What is constructive interference?
add waves together to increase the amplitude
waves going same direction
What is destructive interference?
add waves together to decrease amplitude (can cancel out)
Going opposite direction than the other wave
What is the energy of a photon correlated with?
frequency
What are photons?
discrete packets of energy
What is the duality principle?
light can behave as both a wave and a particle
Do electrons have more energy when they are farther from the nucleus?
yes
Do electrons have more energy when they are closer to the nucleus?
no, they are more stable (lower in energy)
electron is in equilibrium distance
What was the flame test?
every substance gave off a tell-tale colour as it burned under a flame, but some elements gave off too similar of colours
What is the line spectrum?
each element has a unique colour pattern
What is the Bohr model?
1) energy in lamp pushing electrons further from nucleus
2) seeing release of energy (emission of light)
3) Only works for hydrogen
4) quantized energy levels for electrons
5) planetary model
6) electron’s energy increases closer to the nucleus
What is the stair analogy?
each line of colour requires a specific wavelength
Can electrons use any number of energy to get closer to the nucleus?
no, they require very specific amounts of energy
What is the Rydberg equation?
△E= -R(1/nf^2 - 1/ni^2)Z^2
What is nf?
final orbit
