This image was acquired from
pixabay. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
einstein physicist conference solvay black and white auguste piccard mile henriot paul honour proof heart of douard thophile de donder erwin schrdinger jules mile verschaffelt wolfgang pauli werner heisenberg ralph howard fowler lon brillouin peter debye martin knudsen william lawrence bragg hendrik anthony kramers paul dirac arthur