It’s funny because I only recently heard of vsauce a couple days ago, and I was just learning about vision in two different classes: Cognitive Psych, and Psych of Sensation and Perception.
Just like “sound” is a psychological artifact of the mind, while “pressure waves” are not. So if a tree falls, there are pressure waves of a certain nature, amplitude, and frequency. But there is no “sound” per se because any “sound” you hear undergoes a great deal of processing. For example: have you heard of the
McGurk effect? You can study it for years and it still will fool you every time.
Colors are like that. If there is a rainbow, but no eye sees it, it remains electromagnetic waves of various frequency and amplitudes and going some this way, some that. Just like radio waves and microwaves and all kinds of other stuff; there is just a certain “special little segment” that our eyes have adapted to apparently consider this thing “color” as useful – and we can now sense a certain part of the spectrum.
Also, if you have Netflix, be sure to check this out because it’s covered very well by the pilot episode of “Brain Games.”
Hey check out some of the cool features about vision in
chapter 4 of my textbook companion for my Perceptions class: you can even try out the activities and the quizzes inside them, but just not the “instructor quizzes” (because your instructor has to set you up for that so you’ll have a login). Some of the activities are buggy, like the adding and subtracting color thing inn chapter 5. It’s new and they’ve requested comments so I’ve emailed them about it.
In terms of your ideas about heaven, I totally get what you’re asking. I don’t even consider that my “thoughts” will be the same as I experience “thoughts” now – like if my brain dies there is this little “thought center” that is the true eternal “essence” of me that’s going go be disembodied somewhere. That’s really kind of hard to image, I think. So really without eyes and lateral geniculate nuclei and visual cortices and all that to be connected up, seems to me there would be no “vision” in the way we know it now. So yeah, it’s all have to depend on the body getting itself back together it would seem to me.