Quote by: Roger Penrose

Ordinary photons do have spin, they have a notion of helicity so they spin around their direction on motion.


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Author Bio


  • NameRoger Penrose
  • DescriptionEnglish mathematical physicist, recreational mathematician and philosopher
  • BornAugust 8, 1931
  • CountryUnited Kingdom
  • ProfessionMathematician; Physicist; Writer
  • AwardsFellow Of The Royal Society; Copley Medal; Royal Medal