সাঁচ:Physical constants/doc
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এয়া হৈছে ‘সাঁচ:Physical constants’ শীৰ্ষক সাঁচটোৰ নথিকৰণৰ উপপৃষ্ঠা। ইয়াত সাঁচটো ব্যৱহাৰৰ তথ্য, শ্ৰেণীসমূহ, আন্তঃৱিকি সংযোগবোৰ আৰু অন্য সমল থাকে, যিবোৰ মূল সাঁচ পৃষ্ঠাটোৰ অংশ নহয়। |
This template provides easy inclusion of the latest CODATA recommended values of physical constants in articles. It gives the most recent values published, and will be updated when newer values become available, which is typically every four years.
The values have been updated to the CODATA 2018 values. This includes the 2019 redefinition of SI base units, which made the values of several constants exact (e.g. e), whereas some previously exactly defined constants acquired an uncertainty (e.g. μ0).
Usage
[সম্পাদনা কৰক]Arguments
[সম্পাদনা কৰক]symbol- If set to
yes, the value is preceded by the symbol of the constant, followed by ≈ or = depending on whether or notroundis set. round- If omitted, the value is shown along with its standard uncertainty. If set to an integer n, the value is rounded to the first n digits after the decimal point (retaining trailing zeros).
unit- If set to
no, the unit of measurement is not shown. ref- If set to
no, no reference is given. If set toonly, only the reference is given. after- Text (e.g. punctuation) to be shown after the constant before the reference.
runc- If set to
yes, this will provide only the relative standard uncertainty of the value and its reference.
Available constants
[সম্পাদনা কৰক]Examples
[সম্পাদনা কৰক]{{Physical constants|c|unit=no|after= [[metre per second|metres per second]].}}
- 299792458 metres per second.[1]
{{Physical constants|mu0|symbol=yes}}
- μ0 = Lua error in Module:Convert at line 657: attempt to index field 'currency' (a nil value).[2]
{{Physical constants|G|symbol=yes}}
- G = Lua error in Module:Convert at line 657: attempt to index field 'currency' (a nil value).[3]
{{Physical constants|hbar|round=2|symbol=yes}}
- ħ ≈ 1.05×10−34 J⋅s[4]
The relative standard uncertainty of ''m''<sub>u</sub> is {{Physical constants|mu|runc=yes|after=.}}
- The relative standard uncertainty of mu is 3.0×10−10.[5]
For the electron mass, {{Physical constants|me|runc=yes|symbol=yes|ref=no}}.
- For the electron mass, ur(me) = 3.0×10−10.
NIST publishes the CODATA value of the [[elementary charge]].{{Physical constants|e|ref=only}}
- NIST publishes the CODATA value of the elementary charge.[6]
See also
[সম্পাদনা কৰক]{{CODATA2010}}
References
[সম্পাদনা কৰক]- ↑ "2018 CODATA Value: speed of light in vacuum". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?c। আহৰণ কৰা হৈছে: 2019-05-20.
- ↑ "2018 CODATA Value: vacuum magnetic permeability". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?mu0। আহৰণ কৰা হৈছে: 2019-05-20.
- ↑ "2018 CODATA Value: Newtonian constant of gravitation". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?bg। আহৰণ কৰা হৈছে: 2019-05-20.
- ↑ "2018 CODATA Value: reduced Planck constant". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?hbar। আহৰণ কৰা হৈছে: 2019-08-28.
- ↑ "2018 CODATA Value: atomic mass constant". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?u। আহৰণ কৰা হৈছে: 2019-05-20.
- ↑ "2018 CODATA Value: elementary charge". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. http://physics.nist.gov/cgi-bin/cuu/Value?e। আহৰণ কৰা হৈছে: 2019-05-20.