With "heavy" mass I mean mass as a source of gravitation. Being no native english speaker and writer, I tranlated the german term for it literally. I just wanted to point that the equivalence of inertial and "heavy" mass is still true for photons. That both inertial and "heavy" mass are always the same was in doubt in physics for centuries. Until GR proved it.
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IT security specialist, Physicist by education, believing in God as for the exceptional harmony of the laws of nature to create and support life.
