Where do I go to ask?

Sometimes, when I want to learn something, I feel like I’m asking the right questions, but google isn’t who I should be asking, so my question is taken apart, and I get answers to the wrong questions. I just want to ask questions about random things. Does photosynthesis require the sun’s light because of light, or is it the heat from the light, or is it both? Can you funnel light through a series of mirrors so that it’s just as bright on the far end? Could you create an underground farm, using said funnel to give plants the light they need to grow? Does anyone else ever have this issue?