So, I’m obviously new to studio lighting. I understand the basics of exposure and I’m aware of the inverse square law, which leads me to the question in my title: how can the remote trigger on the camera adjust the flash power for the off camera flash?

Do you have to input the distance the flash is from the subject? I found a Wikipedia article describing how TTL metering works, but I think my question is different.

Honestly any guidance on how to learn how to calculate exposure using multiple strobes would be appreciated.