Edison and Einstein never met in person. Edison was significantly older than Einstein, and Einstein did not immigrate to the U.S.A. until 1933, two years after Edison had passed away. For perspective, in 1879, when Einstein was born, Edison had just perfected the first practical Incandescent light.
Yes, Einstein did meet Edison in 1921 when Edison came to visit him in New Jersey. Edison reportedly said to Einstein, "You are the greatest scientist of this age."
Thomas Edison and Nikola Tesla met when Tesla started working for Edison at his company, Edison Machine Works, in 1884. Tesla made significant contributions to the company, but the two inventors had contrasting views on electricity and eventually parted ways due to disagreements on alternating current versus direct current.
There is no definitive evidence to suggest that Albert Einstein and Nikola Tesla ever met in person. While they shared mutual admiration for each other's work, they were not known to have had a personal meeting during their lifetimes.
I would ask Einstein about his thought process and how he approached solving complex problems. Additionally, I would inquire about his views on the intersection between science and philosophy, and how he maintained his curiosity and creativity throughout his life.
Nikola Tesla and Thomas Edison first met in the early 1880s when Tesla began working for Edison's company, the Edison Machine Works. Their relationship was initially positive, but later soured due to differing views on electrical technologies.