Flashcards
Physics iGCSE - Waves Introduction
Flashcards do conjunto (22)
- 1Waves can exist as two main types. These are:Longitudinal and Transverse
- 2One similarity between Transverse and Longitudinal waves are:They both transfer ENERGY (or information) but not particles. They also both have a WAVELENGTH / PERIOD / FREQUENCY / SPEED
- 3Features of a Transverse wave are:For a transverse wave, the points along the wave vibrate at 90 degrees to the direction in which the wave is moving.
- 4Features of a Longitudinal wave are:For a longitudinal wave, the points along the wave vibrate in the same direction that the wave is moving in.
- 5Label Amplitude:The amplitude of a wave is its height, measured from the middle of the wave to its top (or from the middle to its bottom).
- 6Label Wavelength:The wavelength of a wave is the distance from a point on one wave to the same point on the next wave.
- 7Label troughs and peaks:
- 8Label compressions and rare fractions:The areas of high pressure (compression) and low pressure (rare fraction)
- 9Explain what a Frequency is:The frequency of a wave is the number of waves passing a point (or being created or received) every second – it is helpful to think of it as being the waves per second.
The units of frequency are hertz (Hz). - 10Explain what a period is:The time period of a wave is the time taken for a single wave to pass a point (or for a single wave to be created).
Time period is usually measured in seconds. - 11What do waves transfer: Their positions are:When a wave travels between two points, no matter actually travels with it: The points on the wave simply vibrate back and forth about fixed positions.
The wave does, however, transfer energy, yet NO MATTER - 12Calculation for wave speed is:wave speed = frequency x wavelength
v = f x λ - 13When an object is stationery, the wave fronts are:usually, symmetrically spread out
- 14The Doppler Effect is:When an object is moving The wavelength of the waves in front of the source decreases and the frequency increases.
The wavelength behind the source increases and the frequency decreases. - 15When a wave source moves:When a wave source moves: The waves in front of it get squashed together; the waves behind get stretched out
- 16formula for incidence and reflection is:angle of incidence = angle of reflection
i = r - 17This is an example of:Reflection
- 18The definition of refraction is:When waves enter a different medium and their speed can change.
- 19when waves travels from deep water to shallow water it:slows down the waves will bunch together, causing the wavelength to decrease.
- 20An echo is:Sound that has been reflected
- 21We can use to echoes to calculate the speed of sound by:Sound travels at a constant speed in a medium so we can use the equation:
Speed = distance/time - 22To measure speed of sound via the flashbang method we:light travels faster than sound. It is the time between the flash and the bang. For lightening its the seconds divided by 5 (5 seconds is one mile, 10 seconds in two miles)
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- Science FlashCards sobre Physics iGCSE - Waves Introduction, criado por V Ward em 31-05-2021.
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- V Ward
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