The scientific answer to this question is eye and music lol
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
The answer is A focal point. I is <span>the point at which rays or waves meet after reflection or refraction, or the point from which diverging rays or waves appear to proceed.</span>
I already answered this :)
Well i know the greeks and romans used black backgrounds for their vases but i dont know if that is what you are looking for
