Birdwatch Note Rating
2025-01-31 19:05:00 UTC - NOT_HELPFUL
Rated by Participant: 45097FD36F9F7DA6EB9B381C2E35D00064BD3CB51F08E878B7EF99310722CD0C
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