Prompt
                                        
                                            Generate a realistic image of a Dutch physicist from the early 20th century, dressed in formal attire, likely standing in a university setting or in front of a blackboard filled with complex physics equations, with a subtle background that hints at his connection to the Netherlands, such as a faint view of windmills or a Dutch landscape. The physicist should have a dignified and thoughtful expression, possibly with a slight smile, and should be middle-aged to elderly in appearance, reflecting his lifespan of 1878 to 1960. Include some visual nod to his work, such as a diagram of the de Haas–van Alphen effect or the Einstein–de Haas effect in the background. The style should be that of a formal, historical portrait, possibly in the style of photography from the early 20th century, given the realism requirement.