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characteristic
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characteristic

In mathematics, the integral (whole-number) part of a logarithm. The fractional part is the mantissa.

For example, in base ten, 100 = 1, 101 = 10, 102 = 100, and so on; the powers to which 10 is raised are the characteristics. To determine the power to which 10 must be raised to obtain a number between 10 and 100, say 20 (2 × 10, or log 2 + log 10), the logarithm for 2 is found (0.3010), and the characteristic 1 (log 10) added to make 1.3010.



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On a stellar scale, hydrogen-gas clouds speckled with dirty carbon grit drift between stars, blocking light, soaking up heat, and emitting characteristic radiation.
The outside world would not know a blackbody was there unless a small hole in it let a little of its characteristic radiation out.
 
 
 
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