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  2. Optical resolution - Wikipedia

    en.wikipedia.org/wiki/Optical_resolution

    Each element is the 6th root of 2 smaller than the preceding element in the group (e.g. element 1 is 2^0, element 2 is 2^(-1/6), element 3 is 2(-1/3), etc.). By reading off the group and element number of the first element which cannot be resolved, the limiting resolution may be determined by inspection.

  3. Average human height by country - Wikipedia

    en.wikipedia.org/wiki/Average_human_height_by...

    According to a study in France, executives and professionals are 2.6 centimetres (1.0 in) taller, and university students are 2.55 centimetres (1.0 in) taller than the national average. [7] As this case shows, data taken from a particular social group may not represent a total population in some countries.

  4. Body surface area - Wikipedia

    en.wikipedia.org/wiki/Body_surface_area

    There was an average BSA of 1.73 m 2 for 3,000 cancer patients from 1990 to 1998 in a European Organisation for Research and Treatment of Cancer (EORTC) database. [19] During 2005 there was an average BSA of 1.79 m 2 for 3,613 adult cancer patients in the UK. Among them the average BSA for men was 1.91 m 2 and for women was 1.71 m 2. [20]

  5. Reciprocal length - Wikipedia

    en.wikipedia.org/wiki/Reciprocal_length

    That energy amounts to approximately 1.24 × 10 −4 eV or 1.986 × 10 −23 J. The energy is inversely proportional to the size of the unit of which the reciprocal is used, and is proportional to the number of reciprocal length units. For example, in terms of energy, one reciprocal metre equals 10 −2 (one hundredth) as much as a reciprocal ...

  6. Counts per minute - Wikipedia

    en.wikipedia.org/wiki/Counts_per_minute

    Counts per minute (abbreviated to cpm) is a measure of the detection rate of ionization events per minute. Counts are only manifested in the reading of the measuring instrument, and are not an absolute measure of the strength of the source of radiation. Whilst an instrument will display a rate of cpm, it does not have to detect counts for one ...

  7. MNREAD acuity chart - Wikipedia

    en.wikipedia.org/wiki/MNREAD_acuity_chart

    The MNREAD acuity chart or Minnesota low vision reading chart is a text based chart used to measure near visual acuity in people with normal or low vision. [1] It can also be used to measure maximum reading speed, critical print size and the reading accessibility index of a person. [2] Digital and printed types of charts are available.

  8. W. M. Keck Observatory - Wikipedia

    en.wikipedia.org/wiki/W._M._Keck_Observatory

    The W. M. Keck Observatory is an astronomical observatory with two telescopes at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii. Both telescopes have 10 m (33 ft) aperture primary mirrors, and, when completed in 1993 (Keck I) and 1996 (Keck II), they were the largest optical reflecting ...

  9. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...