Anybody know if these rolling digital measures are bullshit? Because it seems pretty cool and if they're not then being able to measure curved surfaces accurately more easily would be really nice, like, absolutely nice enough to pay for one.
Do you say it wrong?
📏 Optical frequency comb integration transforms absolute distance measurement precision
https://phys.org/news/2025-07-optical-frequency-absolute-distance-precision.html
#measurement #instruments #optics #distance #physics #standards
Interesting look at a historical paper that used intensity interferometers to measure the size of the star, Sirius.
https://astrobites.org/2025/08/14/hanburybrowntwiss/
#Astronomy #Space #Stars #Measurement #Interferometry #Papers
With #Dundee offering this year a "short half marathon" (1mi missing, https://www.bbc.co.uk/news/articles/cg4rpv635e7o ), I was not surprised that the last 2 miles of the #KiltwalkDundee being measured at 1.57km and 0.34km (below showing estimates for the last and last 2 miles).