Hi pf, Please help me, the more I read about HUP, the more discrepancies I find between different sources. I found a good article that Zapper made on HUP (https://www.physicsforums.com/insights/misconception-of-the-heisenberg-uncertainty-principle/). My confusion is about the way it is explained and came about after watching this short video: This clip shows two common misconceptions. The second one is about explaining HUP by trying to pinpoint an electron with a high energy photon which kicks the electron giving an uncertainty in its momentum. Both this video and Zapper's post say this is not HUP. However, this is the way it has been taught to me. Also, physics lecturers use this explanation. For example, check 1hr 4mins into this video: https://www.youtube.com/watch?v=JzhlfbWBuQ8 Leonard Susskind clearly explains HUP through photons kicking electrons which gives an uncertainty in momentum - however Zapper and first video say that this is not the uncertainty in HUP. This video by Nottingham University physics department (look at 5mins 20s into video) also explains it the same as Susskind: Please can someone help! Are susskind and sixty symbols correct or is this explanation a common misconception as explained by Zapper and first video. Thanks for any help.