Flashcards
Waves - Key Words
Cards in this deck (25)
- 1amplitudeWaves max displacement from its equilibrium position
- 2Antinodeposition of max displacement on a stationary wave
- 3claddingprotective layer on optical fibre to improve its tensile strength preventing scratching and signal transfer between adjacent fibres
- 4CoherenceWaves are coherent if they have same wavelength and frequency, as well as having a fixed phase difference
- 5Diffraction gratinggrating with hundreds of slits per mm, resulting in sharper interference patterns. They can be used to calculate atomic spacing and analyse elements
- 6EM Waveswaves that consist of perpendicular electric and magnetic waves
- 7frequencyNumber of waves that pass a point in a unit time. Is the inverse of time period
- 8Fringe spacingdistance between two adjacent bright fringes
- 9interfrerncename given to superposition of waves that occurs when they meet. IF in phase the constructively interfere but if out of phase they will destructively interfere
- 10longitudinal waveWave that oscillates parallel to direction of energy propagation. For example, sound waves
- 11material dispersionwaves of different wavelengths travel at slightly different speeds through optical fibre and so reach end at slightly different times, causing pulse broadening. Using monochromatic light fixes this.
- 12Modal Dispersionwaves enter optical fibre at different angles meaning distance beam has to travel differs leading to the beam resching the ned at different times causing pulse broadening
- 13NodePosition of min displacement in a stationary wave
- 14optical fibreA thin glass fibre through which signals are passed through, usually with cladding surrounding them
- 15Path differencemeasure of how far ahead a wave is compared to another wave
- 16phase differencedifference in phase between two points on a wave
- 17phaseMeasure of how far through a wave's cycle a point on the wave is
- 18polarisationrestriction of a wave so that it can only oscillate in a single plane. Can only occur for transverse waves
- 19pulse broadeningelongation of a signal passed down an optical fibre, usually due to modal or material dispersion
- 20refractive indexmaterial property that's equal to the ratio between speed of light in a vacuum and speed of light in a given material
- 21Snell's LawLinks waves angle of incidence to its angle of refraction with use of refractive indexes of mediums involved
- 22stationary wabvewave that stores, but does not transfer energy
- 23Total Internal Reflectionoccurs in optical fibres, where full reflection occurs at the inside boundary of rhe fibre meaning no radiation passes out
- 24Transverse WavesWave with oscillations that are perpendicular to direction of energy propagation
- 25wavelengthDistance between two identical positions on two adjacent waves
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- A level Physics Flashcards on Waves - Key Words, created by kian browne on 13/05/2024.
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- kian browne
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