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Mechanical Shearing Probe on a Human Hair

This image shows a mechanical shearing probe placed on a single human hair. A macroscopic probe (blurry object on the left) moves the microprobe base, which is not visible under the macroscopic probe. The top arm of the microprobe couples force to the shearing plate which is placed on the hair. The bottom arm of the shearing probe has detached from the base. Careful inspection will show that the shearing plate, and along with it the entire hair, moves slightly as the probe base is moved.