Modern physics experiments that could be replicated in Newton's time include Milliken's oil drop experiment, which could be conducted with static electricity and basic vacuum technology, although accuracy may vary significantly. The discussion highlights a successful oil-drop experiment yielding an e/me accuracy of +/- 1%, showcasing the potential for precision even with limited tools. Additionally, approximating the blackbody spectrum using prisms and demonstrating Bernoulli's principle with simple airflow techniques are feasible. The availability of magnets and copper would allow for early explorations into electromagnetism, expanding the scope of experiments possible at that time. Overall, the conversation emphasizes the innovative potential of using existing technology to explore foundational physics concepts.