"As far as engineering and construction goes, the thrust plate in the bearing well is machined so precisely, you cannot measure its flatness mechanically. You have to use wavelengths of light to measure it. Hardly obsolete."
Mechanical measurement of surface roughness is at least two orders of magnitude more accurate than using light (see atomic force microscopy). This has to be one of the most inane comments I've read in quite awhile.
Mechanical measurement of surface roughness is at least two orders of magnitude more accurate than using light (see atomic force microscopy). This has to be one of the most inane comments I've read in quite awhile.