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Physics Chapter 3
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- 1What is meant by Frequency?Frequency is the number of whole oscillations of a wave per second
- 2What is the wave speed formula?V=fλ
- 3What is frequency measured in?Hertz (Hz)
- 4What is a time period?A time period (T) is the time for on whole period of oscillation.
- 5What is amplitude?The amplitude is the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.
- 6How fast is the speed of light?3 x 10^8 meters per second
- 7What is wavelength?The wavelength of a wave is the length between two peaks or two troughs or two antinodes.
- 8Frequency Fact:Higher frequency waves have more energy
- 9How do we calculate Bandwidth?Bandwidth = 2 x Bitrate
- 10Calculating BandwidthBandwidth = 1 / t when "t" is time.
- 11Plane PolarisedWhen the light or signal only vibrates in one direction as opposed to all directions.
- 12Unpolarised LightLight or signal that travels in all axis
- 13Complex SignalsComplex signals are made up of many sine waves of different frequencies and amplitudes.
- 14Examples of digital signalsMorse Code
Binary Code
Clock - 15Examples of Analogue SignalClock
TV - 16Digital Signal RangeDigital signals can be lost with distance
- 17Analogue Signal RangeAnalogue signals can be changed so that they can travel further, but can then be amended when it is received.
- 18What is a bit?A bit is a binary digit, either a 1 or a 0
- 19What is a byte?A byte is a conglomeration of 8 bits.
- 20What is a word?A word is a binary number, usually 32 or 64 bits.
- 21What is a nibble?A nibble is 4 binary digits, or 4 bits
- 22What is a pixel?A pixel is a picture element, which is usually made up of 8 bits, or 1 byte.
- 23What is ASCII?ASCII stands for the American Code for Standard Information Interchange, a system of coding alphanumerical characters into numbers. For example the number 65 is the letter A.
- 24What is Resolution?A resolution is the number of pixels used to describe or display an image (often pixels per mm)
- 25What is the standard sample frequency?The standard sample frequency is 44.1KHz
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- GCSE Physics Fichas sobre Physics Chapter 3, creado por cameron.boyer el 13/02/2015.
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- cameron.boyer
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