Max Planck, German physicist, c 1910.
© Science Museum / Science & Society Picture Library
Photogravure after a photograph by Rudolf Duhrkoop of Max Planck (1858-1947). Born in Kiel, Germany, Planck studied at Munich and Berlin Universities, later becoming Profesor of Theoretical Physics at Berlin (1889-1926). Following his abandonment of clasical physical principles, Planck (1858-1947) introduced the hypothesis that oscillating atoms absorb and emit energy only in discrete bundles (quanta) and not continuously, as had previously been thought. Subsequent developments by other physicists established the quantum theory of modern physics, of which Planck is regarded as the father. In 1918 he was awarded the Nobel Prize for his work in this field. From a collection of portraits of scientists published by Photographische Gesellschaft, Berlin, c 1910. Dimensions: 460mm x 340mm.