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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres (⁠ 1 / 1 000 ⁠ m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).

  3. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    The smallest dimension the human eye can resolve is around 0.02 to 0.04 mm, approximately the width of a thin human hair. [6] A sheet of paper is typically between 0.07 mm and 0.18 mm thick, with ordinary printer paper or copy paper approximately 0.1 mm thick. [7]

  4. Audio tape specifications - Wikipedia

    en.wikipedia.org/wiki/Audio_tape_specifications

    As well as 1 ⁄ 4 in (6.4 mm) tape, studio and multitrack machines use tape widths of 1 ⁄ 2, 1, and 2 inches (12.7, 25.4, and 50.8 mm), and at least one 3 inches (76.2 mm) [citation needed] machine was available for a time. There is also a 35 mm width, but this variety is more similar to the motion picture stock of the same width. It is ...

  5. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    For example, the Nikon D3 and D700 cameras' nominally full-frame sensors actually measure 36 × 23.9 mm, slightly smaller than a 36 × 24 mm frame of 35 mm film. As another example, the Pentax K200D 's sensor (made by Sony ) measures 23.5 × 15.7 mm, while the contemporaneous K20D 's sensor (made by Samsung ) measures 23.4 × 15.6 mm.

  6. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    For example, the length two and a half meters is usually recorded as 2500 mm or 2.5 m; ... Thickness of a human hair (around 80 micrometers) Other

  7. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    The new standards gave an inch of exactly 25.4 mm, 1.7 millionths of an inch longer than the old imperial inch and 2 millionths of an inch shorter than the old US inch. [ 46 ] [ 47 ] Related units

  8. 120 film - Wikipedia

    en.wikipedia.org/wiki/120_film

    The 120 film format is a roll film which is nominally between 60.7 mm and 61.7 mm wide. Most modern films made today are roughly 61 mm (2.4 inches) wide. The film is held in an open spool originally made of wood with metal flanges, later with all-metal, and finally with all-plastic. The length of the film is nominally between 820 millimetres ...

  9. Orders of magnitude (area) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(area)

    61 000 Mm 2 Surface area of Jupiter , [ 93 ] the "surface" area of the spheroid (calculated from the mean radius as reported by NASA). The cross-sectional area of Jupiter, which is the same as the "circle" of Jupiter seen by an approaching spacecraft, is almost exactly one quarter the surface-area of the overall sphere, which in the case of ...