9 ms·
Precisely 21cm or a precise amount that is approximately 21cm?
by lud_lite 1y ago
Precisely 21cm or a precise amount that is approximately 21cm?
- Calwestjobs 1y agoit is not 21 in binary number system nor in mayan, so does not matter, it is just number. same importance for physics as horoscopes, numerology ... but i was pretty annoyed after i read in article - "exactly 21 cm" and then inside of first diagram - "v=1.4GHz" ...
- mkl 1y agoIt's a badly worded subtitle, probably by an editor. From later in the article: "By measuring light of precisely the needed wavelength — peaking at precisely 21.106114053 centimeters".