Unity means just plain regular 1 ?

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    Means Regular Unity
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SUMMARY

The term "unity" in physics and mathematics is definitively synonymous with the numerical value "1". It is often used to avoid ambiguity, as using "1" can lead to confusion with characters like "I" or "l". However, "unity" specifically refers to a dimensionless quantity, distinguishing it from other numerical values that have associated units, such as "1 meter" or "1 kelvin". This terminology emphasizes clarity in scientific communication.

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"unity" means just plain regular "1"?

Im not sure whether this is a physics or math question, but in many physics problems, instead of saying "1", the problem will say "unity", like "the sine of theta is unity" or the "index of refraction is unity". I am assuming "unity" means just plain regular "1"? Is there a particular reason for such funny word use?
 
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hi kahwawashay1! :smile:
kahwawashay1 said:
… I am assuming "unity" means just plain regular "1"? Is there a particular reason for such funny word use?

yes, just good ol' "1" :biggrin:

i'm not sure why, perhaps people think that if they write "the sine is one", the reader will think "one of what?", and if they write "1" it looks like I or l …

or maybe they just like to use long words because "1" isn't big enough! :rolleyes:​
 


Unity is not just "one". It is a "dimensionless one". You can have 1 meter or 1 kelvin or 1 candela, but none of these are properly called "unity".
 

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