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Point


A point is a unit of length used mainly in typography to measure font size, line spacing, and other elements of printed text. It is defined as 1/72 of an inch, which is approximately 0.3528 millimeters.


Key facts:



  • 1 point = 1/72 inch ≈ 0.3528 mm



  • 12 points = 1 pica



  • Used universally in typesetting, desktop publishing, and graphic design



  • Measures font sizes, leading (line spacing), and other typographic details



The point system helps designers and printers maintain precise and consistent text layouts across various media.



Nanometer


A nanometer (nm) is an incredibly small unit of length in the metric system. It equals one-billionth of a meter (0.000000001 meters). Nanometers are used to measure things at the atomic and molecular scale, like the size of viruses, DNA strands, or the width of a few atoms. The symbol for nanometer is "nm". This unit is essential in fields like nanotechnology, physics, and chemistry, where scientists work with materials and particles too tiny to see with regular microscopes. Understanding measurements in nanometers helps researchers develop new materials, medicines, and electronic devices.



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