In a recent tweet, Dr. Michio Kaku stated that perfect blackness would violate the Heisenberg Uncertainty Principle, i.e. every object must emit some radiation. I have two questions regarding this statement.
Could someone please elaborate on how exactly perfect blackness violates the uncertainty principle? I am somewhat familiar with this principle, so a detailed answer would be appreciated.
Apparently, dark matter doesn't emit any radiation. How isn't this a direct contradiction to Kaku's statement and a violation of the uncertainty Principle?