Wave Formulaes Flashcards
Def phase difference.
Give symbol
Phase difference between 2 waves or 2 points on aware is the difference in terms of fractions of a cycle or in terms
of angle
ΔΦ/2π
Def path difference and symbol
Phase difference between 2 waves or 2 points on aware is the difference in terms of fractions of wavelength or in terms
of fractions of period
Δt/T = Δx/λ
Relate phase and path difference
ΔΦ/2π = Δt/T = Δx/λ
Brief def and opposite of standing
Standing: doesn’t transmit energy away from source
Progressive: transmit energy away from source
Brief def and opposite of transverse
- Transverse: The direction of oscillation of wave particles is perpendicular to the direction of the wave propagation/travel
- Longitudinal: The direction of oscillation of wave particles is parallel to the direction of the wave propagation/travel
Name of wave shape
Sinusoidal waveform
Phase difference on a stationary wave is…
I is proportional to
Amplitude²
f²
1/Area
Def Doppler’s Effect
The effect caused by the relative motion of an observer and the source of a wave causing a change in the observed frequency
Def polarization
The vibration/oscillation restricted to one direction
Polarization happens only to … And why
Transverse wave because displacement is perpendicular to the direction of travel
Why polarization cannot happen to …. Waves
polarization cannot happen to longitudinal Waves because oscillations are parallel to the direction of travel/propagation
Def Malu’s Law
Intensity of unpolarized light reduced as a result of polarization
Give formula on Malu’s Law
Ii = Io cos²t
Io is unpolarized intensity
Ii is polarised
t is the angle of polarizer
How is the set up to see the effects a polarizer has on a wave?
Put an analyzer after the polarizer.
If Orientation of polarizer and analyzer is the same, I on analyzer = I incident
Def coherent
Same type of wave (light, water, sound) having same frequency/constant phase difference
D
