Recent comments in /f/mildlyinteresting

ScarecrowJohnny t1_jdxo41a wrote

Reply to comment by thirdtimesdecharm in Gap in hinge of closed garage door acts as a pinhole camera on garage wall by thirdtimesdecharm

When I was a little kid some mornings I'd get into my parents bed. They had these thick brown curtains that blocked out all the light from the street below. At the top of the window where the two curtains intersected the light from the street was projected onto the ceiling and you could see everything going on down there. I used to lie there next to my mom, watching the projection and we'd point out "there goes a blue car", "there goes a yellow bus" etc. It was super cozy.

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EmilyAndCat t1_jdxnrhp wrote

Reply to comment by Kinoko98 in Gap in hinge of closed garage door acts as a pinhole camera on garage wall by thirdtimesdecharm

If you think of the world as being made of dots, each dot emits light in a bunch of different directions. With the light from all the dots pouring into a big hole, it's just a bunch of light. The information for color is kind of lost to the melting pot of all the beams of light

A tiny hole only let's one beam through of each "dot", which retains the color information on the wall because it's not melding with a bunch of other rays.

It's inverted because of how the beams work. You can't have a dot higher than the hole somehow appear higher than the hole in the final image. It travels on a straight line, and thus ends up passing through the hole and landing at the bottom of the final image.

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