I made a camera obscura in my room! (dont ask why)

i did this by covering my windows so that no light could come in then made a hole about 3cm in diameter or ~1.2 inches (this depends on how big your room is, rule of thumb is to measure the length from your window to the farthest wall and divide that by 100)

also, if you make the hole smaller you get a sharper but darker image, and if you make the hole larger you get a brighter but more blurry image. i think you can make it bright AND sharp using some lens, however, i did not have one laying around.

this optical phenomenon is called camera obscura and it even predates photography (by more than 2000 years!), it was used by artists to trace out drawings of the real world to make them more realistic and it was used by astronomers to like look at the sun i think. 

how this works is basically if my windows werent covered then the light would be scattered all over the place, but if it can travel only through that small hole it projects an upside-down image of the outside world, this is because light travels on a straight path and so the light coming from the top is projected at the bottom of our "box" while the light coming from the bottom is projected at the top of the box:

this is actually how analog photography works at its most basic , you poke a hole into a dark box which has some paper or film that is really sensitive to light and changes color based on how much light is shone upon it

this was so fun to create and experience, cause when i made this during spring break i woke up with that view it was amazing.

if ur curious how i made the photograph it was like 800ISO with 30 seconds exposure with my digicam on my pfp

if you're curious like i am these 2 wiki articles are a good read (and watch): 

https://en.wikipedia.org/wiki/Camera_obscura?useskin=vector

https://en.wikipedia.org/w/index.php?title=Pinhole_camera&useskin=vector