Which consequence results when a scanning tunneling microscope's probe is mechanically unstable?

💡 Explanation

In an STM, instability leads to inaccurate height profiling because constant-current feedback relies on precise probe positioning: if the tunneling current changes due to vibration, the feedback function incorrectly adjusts the apparent height. This occurs rather than plastic deformation, or other modes.

• Which outcome occurs when two coherent laser beams impinge on a target in laser-induced breakdown spectroscopy?
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