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Answer for the clue ""I don't know why ___ this way" ", 4 letters:
iact

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Wikipedia Word definitions in Wikipedia
IACT stands for Imaging Atmospheric (or Air ) Cherenkov Telescope or Technique . It is a device or method to detect very high energy gamma-ray photons in the 50 GeV to 50 TeV range. There are currently three operating IACT systems: H.E.S.S. , MAGIC , and ...