Flashcards
Waves
Cards in this deck (12)
- 1Mechanical wavesRequire a medium to transport their energy from one location to another e.g. sound
- 2Electromagnetic wavesProduced by the vibration of charged particles and can travel through a vacuum e.g. light
- 3Transverse wavesParticles oscillate perpendicular to the wave's propagation e.g. light
- 4Longitudinal wavesParticles oscillate about mean positions in the same direction as the wave's propagation e.g. sound
- 5WavefrontA surface joining all points in space that are reached at the same instant
- 6RayA line drawn at right angles to the wavefront in the direction of propagation
- 7ReflectionOccurs when an incident beam bounces off the boundary between two mediums
- 8DiffractionBending of waves around a gap or obstacle
- No change to c, λ or f - 9Extent of diffraction- As λ decreases, diffraction is less (decreased angle of spread)
- As slit width decreases, diffraction is greater (increased angle of spread)
- 10RefractionChange in direction of a wave as it passes from one medium to another
- f does not change
- As speed increases, wave bends away from normal
- If it meets the interface at right angles, it will not change direction
- Sound travels faster in warmer air
- 11SuperpositionWhen two or more waves of the same nature travel past a point in a medium, they will add to produce a net displacement at that point
e.g. constructive (in-phase, large amplitude), destructive (zero amplitude), messy - 12Standing waveProduced when two waves of the same frequency and amplitude but travelling in opposite directions exist in a medium (repeated interference)
- Fixed pattern of min/max displacement
- Node = point of destructive interference
Antinode = point of constructive interference
- Distance between nodes = λ/2
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- Physics Y12 (Wave Particle Duality and Quantum Theory) Flashcards on Waves, created by Mel M on 06/08/2017.
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- Mel M
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