What Future Topic Interests You?
3 Comments

  • David - 1 year ago

    Thanks for sorting out that electric field and magnetic field business. Until I saw your video I felt like I was in class and the teacher was saying ‘electric field’ and ‘magic field’ and I have my hand up and the teacher picking the other kids and talking about Santa clause and the ‘magic field’..... Finally I can put my arm down.
    Sooo ..... ( my arms up again :-/ ) space and time - if nothing moves then time isn’t really a thing right? If distance didn’t exist then ‘time’ wouldn’t be a thing right? It looks to me like the teacher is making stuff up again. Is there really a “magic time” or is it just the record of accumulated of motion through distance to the beat of elastic field interactions? ( phew I can put my arm down again)

  • Milivoje Kostic - 2 years ago

    More at: https://arxiv.org/pdf/2001.05991
    A recent Science Advances paper by Schilling et al, claiming “flow of heat from cold to hot without intervention” with “oscillatory thermal inertia” are fundamentally misplaced and dramatized as miraculous, even though compliance with the Second Law of thermodynamics is acknowledged. There is nothing “magical and beyond the proof-of-concept” as claimed. It could have been achieved by any work generating device, stored by any suitable device (superconductive inductor was beneficial but not essential as claimed), and such stored work used subsequently in any refrigeration device to sub-cool the body. Cooling devices work by transforming temperature to desired level by work transfer (thermal transformer and temperature oscillator), by non-thermal, adiabatic processes. However, the “direct heat transfer” is always from higher to lower temperature in all refrigeration components, without exception – it is not to be confused by “net-transport of thermal energy by work” from cold to hot ambients. The unjustified claims are critically analyzed and demystified at https://arxiv.org/pdf/2001.05991

  • hari hatran R - 2 years ago

    what is the role of splitting the spectral lines(zeeman effect) in laser cooling,i know you red/blue shifted but still this concept doesn't seem to settle for me

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