waves 2 + quantam physics
eV
energy transferred when one electron travels through a potential difference of 1 volt
hf
Φ +KE
work function
minimum energy required to free an electron without any kinetic energy
de broglie equation
λ = h/p
stationary wave
formed when two progressive waves with the same frequency pass through each other in opposite directions and superimpose
nodes
the point on a stationary waves with zero frequency and amplitude
antinode
the point on a stationary wave with the maximum displacement
phase difference
the difference at which point the wave is in its oscillation
path difference
the difference in distance that two waves have travelled in terms of the wavelength
coherence
waves that have the same frequency, wavelengh and a fixed phase difference
youngs double slit
λ = ax/d
principle of superposition
when two waves meet the total displacement at a point is equal to the sum of the individual displacements at that point
closed end tube
antinode at the open end
open end tube
both ends have antinode
stationary wave 2
don't transfer energy but store it
progressive waves
waves that move through matter and transfer energy
amplitude
a waves maximum displacement from its equilibrium position
constructive interference
the type of interference that occurs when two waves
meet in phase. The wave amplitudes are superposed
diffraction
The spreading of waves as they pass through a gap of a similar to the magnitude to their wavelength.
intensity
The power transferred per unit area. It is proportional to the square of a wave’s amplitude
polarisation
The restriction of a wave so that it can only oscillate in a single
plane. This can only occur for transverse waves.