1925494
Description
Flashcards by Hannah Munday, updated more than 1 year ago
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Created by Hannah Munday
almost 11 years ago
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| Question | Answer |
| Wavelength = Speed / Frequency | |
| Electromagnetic Spectrum | |
| Units Fundamental Quantity | Mass (kg) Distance (m) Time (s) Temperature (°C) |
| Units Derived Quantity | Speed (ms-1) Acceleration (ms-2) Force (N or kgms-2) Work (J or kgm2s-2) Power (W or Js-1) |
| Data | Reliable - lots of data agree Precise - small spread of values Accurate - close to the 'true' value |
| Types of Wave | |
| Frequency = 1 / Time | |
| Amplitude | Measured in (m) |
| Pixel Resolution | Resolution = Scene size / Number of pixels |
| CCD Charge Coupled Device | Charge generated by light sensitive pixels Energy increases with: - time - brightness - pixel size |
| CCD Charged Coupled Device | Communicates: - row number - column number - light intensity |
| Measurement and Uncertainty | Resolution - precision of measuring instrument Systematic error - constant error in reading Random error - anomalous readings |
| Velocity = Wavelength x Frequency | |
| Digital Numbers | 8 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) |
| Cones measure colour Rods measure black and white intensity | |
| Investigating Lenses | Where 1/f is the power of the lens (measured in dioptres) |
| Converging and Diverging Lenses | Convex Concave |
| Refractive Index | RI = Speed of light in a vacuum / Speed of light in a medium Where the RI is greater than 1 |
| Lens Maker Equation | u is negative v is positive f is the focal length All measured in (m) |
| Curavture | Curvature = 1 / Radius Curvature reaching the lens = 1/u Curvature leaving the lens = 1/v Curvature added = 1/v - 1/u = 1/f (power) |
| Magnification | Linear magnification = height of the image / height of the object = v/u |
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