HORTICULTURE

Detailed explanation-1: -A strand of human DNA is 2.5 nanometers in diameter. There are 25, 400, 000 nanometers in one inch. A human hair is approximately 80, 000-100, 000 nanometers wide. A single gold atom is about a third of a nanometer in diameter.

Detailed explanation-2: -A nanoparticle is a small particle that ranges between 1 to 100 nanometres in size. Undetectable by the human eye, nanoparticles can exhibit significantly different physical and chemical properties to their larger material counterparts.

Detailed explanation-3: -In metric sizes, anything between 1nm and 999 nm is on the nanoscale. Although 999 nm is still formally on the nanoscale, a very commonly used upper limit for nanomaterial size is 100 nm. This covers most nanomaterials, but there are exceptions.