sentences:  Albert Einstein asked Mark and his colleagues worked to use the intense and powerful X-ray tubes available at their laboratory to verify the Compton Effect; this work provided the strongest confirmation yet of Einstein's light quantum theory for which he won the Nobel Prize in Physics.In 1926 Kurt Meyer of IG Farben offered Mark the assistant directorship of research at one of the company's laboratories.In his years at Farben, Mark worked on the first serious attempts at the commercialization of polystyrene, polyvinyl chloride, polyvinyl alcohol, and the first synthetic rubbers.