He invented the camera obscura, the precursor to the pinhole camera, to demonstrate how light can be used to project an image onto a flat surface. Earlier references to the camera obscura have been found in Chinese texts dating to about 400 B.C. and in the writings of Aristotle around 330 B.C.
Answer:
Thats called an opinion
Explanation:
I like Marshmello way better
You could google this, but the ratio between frequencies of one octave to the next is 2:1
Answer:
2) not therir will say thanks
Explanation:
3) yes u have to use it
enjoy your thanksgiving