Use Science Daily to find and compare the latest CODATA values for the constants of physics by value, unit of measure, uncertainty, and category. Data from NIST.
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Constant Name
The constant's common name.
Units of Measurement
The constant's unit of measurement.
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Unit
Uncertainty
Constant
Using the Constants in Physics dataset
The United States National Institute of Standards and Technology
The United States National Institute of Standards and Technology (US NIST) was founded in 1901 to promote the study of physics and mathematics in the United States. Since that time, NIST measurements have supported everything fron nanotechnology to earthquake-resistant skyscrapers. The Committee on Data for Science and Technology (CODATA) was established in 1966 as an interdisciplinary committee of the International Council for Science. It seeks to improve the compilation, critical evaluation, storage, and retrieval of data of importance to science and technology. The NIST periodically packages and releases the latest CODATA recommended values for constants in physics and mathematics. Values of constants provided on this comparison are generally recognized worldwide for use in all fields of science and technology. The values became available on 2 June 2011 and replaced the 2006 CODATA set. They are based on all of the data available through December 31, 2010.
How to Find Constants in Physics
Value
The numerical assessment of the constant.
Unit
The constant's unit of measurement.
Uncertainty
Methods used to measure the constant leave certain levels of uncertainty that, at present, are unavoidable.