Test
Imaging and Signalling
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Preguntas del test (18)
1Speed=
- AWavelengthxFrequency
- BWavelength/Frequency
- CFrequency/Wavelength
2Electromagnetic radiation is made up of...
- Aone tranverse wave
- Bone polarised wave
- Ctwo tranverse waves
- Dtwo magnetic waves
3A polarised wave oscillates
- AIn 2 directions (N to S and E to W)
- BIn 4 directions (N,S,E and W)
- CIn 1 direction only
4Absolute refractive index has the letter symbol?
- Ar
- Bi
- Cn
- DrI
5The more powerful the lens...
- A...the thicker it is so the curve is smaller resulting in a longer focal length
- B...the thicker it is so the curve is larger resulting in a longer focal length
- C...the thicker it is so the curve is larger resulting in a shorter focal length
6Which are correct?
- An=c/v
- B1/u=1/v+1/f
- CP=f/1
- Dm=v/u
- Ev=1/m
7Replacing pixels with the median reduces
- ADark spots
- BNoise
- CContrast
8The laplace rule is used to add false colour
- AVerdadero
- BFalso
9Multiplying by a fixed variable when altering images results in...
- AEdge detection
- BContrast improvements
- CNoise reduction
10Rate of transmission of a digital signal=
- Asamples per secondxbits per sample
- Bsamples per secondxbandwidth
- Cbits per samplexbandwidth
11What is the focal distance of a lens?
- ADistance it would focus if the waves going into it were flat
- BDistnace that waves meet behind the lens
- CDistance of refraction
12How do you show magnification of a lens that is upside down and two times the size?
- A-x^2
- B-2x
- Cx^-2
13Number of bits in t seconds=
- ASample frequency/bits per second
- BSample frequencyxbits per secondxt
- CSample frequencyxbits per secondx1
14The bandwidth is...
- Athe range of frequency containing the signal
- Bapproximately the sample frequency
- Cbit ratex sample frequency
15Radio recievers...
- AFirstly remove the carrier wave then filter the signal
- BFirstly filter the signal then remove the carrier wave
- CDivide the carrier wave then filter the signal
16The bigger the bandwidth...
- Athe higher the frequency you can record so the better the quality
- Bthe lower the frequency you can record so the better the quality
- Cthe lower the frequency you can record so the poorer the quality
17You should assume...
- Aminimum bitrate is approximately bandwidth
- Baverage bitrate is approximately bandwidth
- Cmaximum bitrate is approximately bandwidth
18To calculate bitrate needed in bits per second you need to times...
- Abits per sample
- Bbandwidth
- Cfrequency
- Dsample frequency
- Ebitrate
Información
- Descripción
- A Level Advancing Physics Test sobre Imaging and Signalling, creado por AbiGooderham el 06/05/2014.
- Autor
- AbiGooderham
- Idioma
- English
- Visitas
- 10
- Etiquetas
- Valoración
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