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Table of metric prefixes for SI units.
TL:DR – Nano means a billionth, a billionth of whatever unit you’re talking about, smaller than that and you are talking pico (a million-millionth), femto (a million-billionth), atto (a billion-billionth), zepto (a billion-trillionth), yocto (a trillion-trillionth).
A nanometer (nm) is 1,000 times smaller than a micrometer. It is equal to 1/1,000,000,000th or one-billionth of a meter. When things are this small, you can't see them with your eyes, or a light microscope.
One nanometer is about as long as your fingernail grows in one second. The illustration below has three visual examples of the size and the scale of nanotechnology, showing just how small things at the nanoscale actually are.
A nanometre is very, very small – there are a million of them in a millimetre. ‘Nano’ means ‘a billionth’ (a billion is a thousand million), so: a nanometre is a billionth of a metre. a nanosecond is a billionth of a second.
In particular, the smaller prefixes such as nano, pico, femto, etc., are becoming increasingly common as analytical chemistry and biotechnology develop more sensitive methods. To help you visualize the effect of these prefixes, there is a column "a sense of scale", which gives some examples of the magnitudes represented.
Beyond Nano: Exploring Tiny Angstroms and Femtometers • Tiny Distance Units • Discover the world beyond nanometers as we delve into the measurements of angst...
As the infographic above shows, the question, how small is small, can really only be answered with: it’s relative. But we can confidently say when looking at the nano universe in relation to...
A nanometer (nm) is 1,000 times smaller than a micrometer. It is equal to 1/1,000,000,000th or one-billionth of a meter. When things are this small, you can’t see them with your eyes, or a light microscope.
What's smaller? The length of an amoeba or the width of a muscle cell ? The answer may surprise you. This size and scale activity is an exercise to test your knowledge of the nanoscale!