Birdwatch Note Rating
2025-01-31 18:19:48 UTC - NOT_HELPFUL
Rated by Participant: A94452F960E2CB60316B00A671BBB78844FEB268DCF3B0256E7B3A19F4BA165A
Participant Details
Original Note:
The device shown is a LEVEL, it shows if the surface it is placed on is even side-to-side to the local gravity field. To determine if a surface is FLAT, one should use a Kemet Flatness Gauge* or an interferometer or autocollimator.** * https://www.kemet.co.uk/products/flatlapping/flatness-gauges ** https://www.mitutoyo.com/webfoo/wp-content/uploads/15004A.pdf
All Note Details