- #1

gggnano

- 43

- 3

- TL;DR Summary
- Not saying that the average roughness is 1 nm because that could mean if million points have 1nm but one is 5 times higher than (1000000+5)/1000001 which is 4-5 times "fake" lower

I mean you could buy a mirror or silicon wafer but they give say 0.5 nm or 5nm 'roughness' which I suspect is the mean average roughness but this doesn't rule out a high "bump" way above the mean average such that for example 1 million bumps of 1 nm and just one of 5 will result in (1000000+5)/1000001 or 4.99... times lower than the highest peak, despite a mean average of ~1. Online stores don't tell you how high is the highest point of 'ideal surface' such as a silicon wafer. Maybe I should use powerful 80w+ laser to flatten the surface? Thanks!