Flashcards
Imaging
Cards in this deck (21)
- 1—Wavelength = Speed / Frequency
- 2Electromagnetic Spectrum
- 3Units Fundamental QuantityMass (kg)
Distance (m)
Time (s)
Temperature (°C) - 4Units Derived QuantitySpeed (ms-1)
Acceleration (ms-2)
Force (N or kgms-2)
Work (J or kgm2s-2)
Power (W or Js-1) - 5DataReliable - lots of data agree
Precise - small spread of values
Accurate - close to the 'true' value - 6Types of Wave
- 7—Frequency = 1 / Time
- 8AmplitudeMeasured in (m)
- 9Pixel ResolutionResolution = Scene size / Number of pixels
- 10CCD Charge Coupled DeviceCharge generated by light sensitive pixels
Energy increases with:
- time
- brightness
- pixel size
- 11CCD Charged Coupled DeviceCommunicates:
- row number
- column number
- light intensity - 12Measurement and UncertaintyResolution - precision of measuring instrument
Systematic error - constant error in reading
Random error - anomalous readings - 13—Velocity = Wavelength x Frequency
- 14Digital Numbers8 bits = 1 byte
For n bits, there are 2 to the power of n discreet levels
2 to the 10 = 1 kilo byte (kB)
2 to the 20 = 1 meg byte (MB) - 15—Cones measure colour
Rods measure black and white intensity
- 16Investigating LensesWhere 1/f is the power of the lens
(measured in dioptres)
- 17Converging and Diverging LensesConvex
Concave
- 18Refractive IndexRI = Speed of light in a vacuum / Speed of light in a medium
Where the RI is greater than 1 - 19Lens Maker Equationu is negative
v is positive
f is the focal length
All measured in (m)
- 20CuravtureCurvature = 1 / Radius
Curvature reaching the lens = 1/u
Curvature leaving the lens = 1/v
Curvature added = 1/v - 1/u = 1/f (power) - 21MagnificationLinear magnification = height of the image / height of the object
= v/u
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- AS Level Physics (Chapter 1 - Imaging) Flashcards on Imaging, created by Hannah Munday on 28/01/2015.
- Created by
- Hannah Munday
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