Width of a hair

A hair of a young man. Laser 632,8 nm. Look my blog at[br][url]http://hylblog.edu.hel.fi/wpmu/mrahikka/2013/05/17/hiuksen-paksuus/[/url][br][br]The photo was taken 207,7 cm from the interference figure.
My blog[br][url]http://hylblog.edu.hel.fi/wpmu/mrahikka/2013/05/17/hiuksen-paksuus/[/url]

Information: Width of a hair