What is the smallest thing visible?

Answer 1

Russell

Under certain conditions you can see a reaction occur between 2 atoms at a distance of 2 metres. and most people can be taught the necessary focus techniques required, unfortunately those who have poor eye sight and who require glasses cannot.

Find a window which looks to a blue sky, stare into the world beyond the floaters, some you cannot follow, follow the one's you can, observe and you will see.

This is the doorstep to the world of neutrino's and their like.

Answer 2

A small slit that is very brightly illuminated can be seen by the unaided eye. A slit 1/3000 of a millimeter can be seen if the light shining through it is bright enough.

If the contrast is just what you could expect from white and black objects lying nest to each other in even illumination, then most people find it difficult to see anything smaller than 0,05mm (a hair is 0,3mm in diameter).

Answer 3

The smallest distance visible to the naked eye is 10-⁴, or about the average width of a human hair.

Answer 4

With excellent eyesight, on a very clear, still night, the unaided human eye can see stars of fifth magnitude.

Answer 5

wouters lip wouters lip

Answer 6

20 micron

Answer 7

atom