Karteikarten
Physics: Topic 3 - Waves
Karten in diesem Stapel (33)
- 1WavesAre a means of transferring energy from place to place. they can also transfer information, and they don't transfer matter.
- 2Longitudinal WavesLongitudinal Waves vibrate parallel to the direction of the energy or wave (e.g. Sound Waves)
- 3Transverse WavesLongitudinal Waves vibrate perpendicular to the direction of the energy or waves (e.g. light Waves)
- 4Diagram of Transverse and Longitudinal Waves
- 5Amplitude (A)is the maximum movement of particles in a wave
- 6Wavelength (λ)the distance between a particular point on a wave and the same point on the next wave.
- 7Frequency (f)the number of waves produced by a source
- 8Period (t)the time it takes for a source to produce one wave
- 9Wave Speed (v) =Wave Speed (v) = frequency (f) x wavelength (λ)
V = f x λ - 10Frequency (f) =Frequency (f) = 1 / Period (t)
f = 1/t - 11Diffractionis the spreading out of waves. Diffraction is a property that is demonstrate by all waves.
- 12Diagram of Diffraction
- 13Electromagnetic Spectrumis a continuous spectrum of waves which includes the visible spectrum. (all transverse)
- 14Image of the Electromagnetic Spectrum
- 15Visible Spectrumis the part of the electromagnetic spectrum that humans can see
- 16Image of the Visible Spectrum
- 17uses of the Electromagnetic Spectrum
- 18Effect of over Exposure to the EG SpectrumMicrowaves - Internal Heating of Body
Infra red - Skin Burns
ultraviolet - Damage to Surface Cells and Blindness
Gamma Rays - cancer, mutation - 19Law of Reflectionangle of incidence = the angle of reflection
- 20Diagram of Reflection
- 21Ray Diagram of a Mirror
- 22Ray Diagram of a Periscope
- 23Refractionis the change in dirrection of a light ray a it passes through an object
- 24Diagram of Refraction
- 25The Relationship of the refractive index, the angle of incidence and the angle of refraction.Refractive Index (n) = sin i (angle of incidence) / sin r (angle of refraction)
n = sin i / sin r - 26Total Internal Relfection
- 27the relationship between the critical angle and the angle of refractinosin c (critical angle) = 1 / n (refractive index)
- 28Digital Signalsto send a message using digital signals the information is converted into binary. these numbers are then converted into electrical pulses.
- 29Analogue Signalsin analogue signals the information is converted into electrical voltages or currents that vary continuously.
- 30Advantage of Digital Signals- easier to regenarate the signals
- 31Why can digital signals carry more informationthey send more pulses of info per second than analogue signals
- 32Human hearing Frequency Range20Hz - 20000Hz
- 33UnitsFrequency - Hz
Wavelength - λ
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- Igcse Science (Physics) Karteikarten am Physics: Topic 3 - Waves, erstellt von matthew waite am 25/10/2016.
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- matthew waite
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