Answer Happy

Posted: **Mon May 02, 2022 4:43 pm**

: 6 A Scanning Tunnelling Microscope Stm Is Used To Scan A Conducting Surface Which Is Biased By 0 75 V With Respect T 1 (16.96 KiB) Viewed 24 times

6. A scanning tunnelling microscope (STM) is used to scan a conducting surface which is biased by -0.75 V with respect to the tip of the STM. Estimate the distance the tip has to be moved away from the surface to lower the tunnelling current by 25%. The work function of the tip is 4.1 eV.