It is difficult to guess even a dream of a world - we do not even dream of its features. Take a look around your room, take a look, see what? Your computer, chair, table, your bed?Let's think of yourself 20 times smaller - what will you see now?
Maybe there's one on the floor and you'll feel like a gigantic building to see your table.
But if you have been reduced to 1000 million times, what will you see?
Will you have a chair or a table?
Rather you will see things by which your chair, table, consists of everything in this world; Molecules, atoms, proteins, cells etc.
How big is this "Nano"?
Source
Capture a photo using your smartphone or any camera and open it with Photoshop.
Keep zooming in the photo
The zoom will zoom in and the picture will become dull once and finally
Only the four-cornered brick wall can be seen.