Prompt
                                        
                                            Generate a realistic image of a middle-aged German man from the early 20th century, dressed in formal attire, with a thoughtful expression, standing in front of a blackboard filled with complex mathematical equations, representing Richard Becker, a renowned physicist, with a subtle background hinting at his association with the University of Göttingen or Dresden University of Technology, in a style reminiscent of classic scientific portraits from the era.