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2. Help:Convert - Wikipedia

   en.wikipedia.org/wiki/Help:Convert

   By default, the output value is rounded to adjust its precision to match that of the input. An input such as 1234 is interpreted as 1234 ± 0.5, while 1200 is interpreted as 1200 ± 50, and the output value is displayed accordingly, taking into account the scale factor used in the conversion.

3. Help:Convert units - Wikipedia

   en.wikipedia.org/wiki/Help:Convert_units

   Metric prefixes; Text Symbol Factor or; yotta Y 10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T

4. Reciprocal length - Wikipedia

   en.wikipedia.org/wiki/Reciprocal_length

   Spatial frequency is a reciprocal length, which can thus be used as a measure of energy, usually of a particle. For example, the reciprocal centimetre, cm −1, is an energy unit equal to the energy of a photon with a wavelength of 1 cm. That energy amounts to approximately 1.24 × 10 −4 eV or 1.986 × 10 −23 J.

5. Gal (unit) - Wikipedia

   en.wikipedia.org/wiki/Gal_(unit)

   This image has been normalized to remove variation due to differences in latitude. The gal (symbol: Gal), sometimes called galileo after Galileo Galilei, is a unit of acceleration typically used in precision gravimetry. [2] [3] [4] The gal is defined as 1 centimeter per second squared (1 cm/s 2).

6. List of conversion factors - Wikipedia

   en.wikipedia.org/wiki/List_of_conversion_factors

   = 5.08 × 10 −3 m/s 2: foot per second squared: fps 2: ≡ 1 ft/s 2 = 3.048 × 10 −1 m/s 2: gal; galileo: Gal ≡ 1 cm/s 2 = 10 −2 m/s 2: inch per minute per second: ipm/s ≡ 1 in/(min⋅s) = 4.2 3 × 10 −4 m/s 2: inch per second squared: ips 2: ≡ 1 in/s 2 = 2.54 × 10 −2 m/s 2: knot per second: kn/s ≡ 1 kn/s ≈ 5.1 4 × 10 −1 ...

7. Canonical units - Wikipedia

   en.wikipedia.org/wiki/Canonical_units

   In astrodynamics, canonical units are defined in terms of some important object’s orbit that serves as a reference. In this system, a reference mass, for example the Sun’s, is designated as 1 “canonical mass unit” and the mean distance from the orbiting object to the reference object is considered the “canonical distance unit”.

8. Gigapixel image - Wikipedia

   en.wikipedia.org/wiki/Gigapixel_image

   A terapixel image is an image composed of one trillion (10 12) pixels.Though currently rare, there have been a few instances such as the Microsoft Research Terapixel project for use on the Fulldome projection system, [3] a composite of medical images by Aperio, [4] [5] and Google Earth's Landsat images viewable as a time-lapse are collectively considered over one terapixel.

9. Image formation - Wikipedia

   en.wikipedia.org/wiki/Image_formation

   The ratio of the height of the image to the height of the object is the magnification. The spatial extent of the image surface and the focal length of the lens determines the field of view of the lens. Image formation of mirror these have a center of curvature and its focal length of the mirror is half of the center of curvature.