Statistics for AQA - A Level Physics - Waves #1

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Answer Stats

	Answer	% Correct
Define oscillation	A displacement one way and then the other about an equilibrium position.	0%
Define propagation	Describes the motion of a wave through a medium/space	0%
Describe a transverse wave	Displacement/oscillation of medium/particles is perpendicular to the direction of wave propagation	0%
Describe plane polarised light	Electromagnetic waves with oscillations in a single direction perpendicular to wave propagation	0%
What is the relationship between frequency and time period?	f = 1/T or inverse proportionality	0%
Which waves can't be polarised?	Longitudinal waves	0%
What is µ in f = (1/2L)×√(T/µ)	Mass per unit length of the string kgm⁻¹	0%
Define amplitude	Maximum displacement of the medium from equilibrium	0%
Define displacement (waves)	Measures how far a particle is from its equilibrium position.	0%
Describe the effect of two polarising filters perpendicular to each other	No light is transmitted	0%
Describe the effect of a polarising filter	Only transmits the component of the wave oscillating parallel to the polarising filter	0%
Light reflected from a shiny surface is	partially polarised	0%
What is the phase difference between points quarter a wavelength apart?	Pi/2 radians OR 90'	0%
What is the phase difference between waves in antiphase	Pi radians OR 180'	0%
Light scattered is	polarised	0%
Give a use of polarising filters	Reducing glare in sunglasses and camera, 3D TV, LCD screens,	0%
Define a mechanical wave	Requires a medium to travel in	0%
What is meant by coherent sources of waves	Same frequency and constant phase difference.	0%
Give an example of longitudinal waves	Sound, primary seismic waves	0%
Define frequency	The number of wave cycles per second OR the number of waves passing a point per second	0%
Define time period	Time for one complete wave cycle	0%
Give an example of transverse waves	Waves on a plucked string, secondary seismic waves, electromagnetic radiation	0%
Describe unpolarised waves	Waves with oscillations in many directions perpendicular to wave propagation.	0%
Describe the principle of superposition	When two or more waves meet the total displacement is the (vector) sum of the displacements of the individual waves.	0%