this post was submitted on 17 Oct 2024
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.

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[–] [email protected] 38 points 2 months ago (2 children)

Lol no. That‘s not how glasses work.

[–] [email protected] 4 points 2 months ago (1 children)
[–] [email protected] 1 points 2 months ago (1 children)

Wait, what is that painting? I like it and want to know more/the context.

[–] [email protected] 2 points 2 months ago* (last edited 2 months ago) (1 children)

It's Plato's allegory of the cave

Here's the original art, though I can't find the original source/artist:

1000005768

[–] [email protected] 3 points 2 months ago (1 children)
[–] [email protected] 22 points 2 months ago (1 children)

It didn't "project", it just bend the light by refraction so it enter your eye in different way, making you see clearer.

Appreciate your thought in the shower though.

[–] [email protected] -2 points 2 months ago* (last edited 2 months ago)

"Projection (physics), the action/process of light, heat, or sound reflecting from a surface to another in a different direction"

Also see my other reply. ... And downvote it. 😀

[–] [email protected] 21 points 2 months ago (1 children)

Since the light actually passes through the glasses and just gets refracted, there's no screen in front of your eyes. It's like looking through water, a window or anything else translucent/transparent.

[–] [email protected] -2 points 2 months ago* (last edited 2 months ago) (1 children)

I think people might have misunderstood what I meant. I didn't mean there's an actual projector and screens like in a movie theater. Let me elaborate:

Imagine you're standing in a room with a light behind you on a ceiling. You're facing a wall. The light is coming from behind you and bouncing off the wall. What you're seeing is a projection of the wall into your eyes. You wouldn't say that you're looking at the light directly behind you.

Imagine the overhead projector (if you're at least as old as I am). It doesn't have any electronics. It's just a strong light, a lens and a mirror. And it projects the writing on the wall. You're looking at a projection on the wall in the classroom. You wouldn't say you're looking directly at the ink on the transparent piece of plastic used in those projectors.

What if the window you're looking through was actually a prism that refracts light at a right angle and you'd be seeing stuff that's actually on the far left side of the house? Would you say you're looking directly through the window like you would if it was an ordinary window?

You can see this effect on the glasses if you place them on the table and look at them. You won't see the table cloth underneath the lenses straight through them. They refract the light and you will see an image on them of whataver object they're pointed at.

That's what I meant by projection.

Also, in the right conditions you can see through water and a reflection of something on it's surface at the same time.

[–] [email protected] 5 points 2 months ago (1 children)

In that case, you'd never see anything through anything but a "screen" because of the lens in your eye. (Using the definition of "screen" to be a "barrier", which in this case provokes a transformation, or projection, of light.)

[–] [email protected] -1 points 2 months ago* (last edited 2 months ago) (1 children)

Yes, but I wear glasses so there's an additional "screen". That's all I was saying. It didn't occur to me at the time that we all already have lenses in the eye. So I guess me talking about glasses was redundant. I should have made the same post about those lenses. Fuck it. Live and learn ...

[–] [email protected] 1 points 2 months ago (1 children)

Doesn't matter, it's fun to see how far you can bend definitions (and I did go rather far with that one).

Also, I'm not sure where those down votes are coming from. Showerthoughts don't need to be fully logical, taking all edge cases into account, etc. After all, it's just a showerthought to discuss and joke/awe about.

[–] [email protected] 1 points 2 months ago (1 children)

I'm sorry, but I wasn't downvoting you.

[–] [email protected] 2 points 2 months ago

Oh, no no, I was talking about the down votes that you've been receiving. My bad!

[–] [email protected] 14 points 2 months ago* (last edited 2 months ago) (2 children)

as someone who needs coke bottles to see properly, i understand how you feel

i would also love to smoke some of the weed you had before posting this

[–] [email protected] 1 points 2 months ago

Don't mix coke and weed.

[–] [email protected] -1 points 2 months ago

No, it's "high, how are you?"

My dad calls them ashtrays.

[–] [email protected] 14 points 2 months ago* (last edited 2 months ago) (1 children)
[–] [email protected] 0 points 2 months ago (2 children)
[–] [email protected] 2 points 2 months ago

I like your style, Socrates

[–] [email protected] 2 points 2 months ago (1 children)

Either look up how lenses work or go back to your Play-Doh’s cave.

[–] [email protected] 1 points 2 months ago

My cave is made of plastecine, thank you very much!

[–] [email protected] 13 points 2 months ago

You're never looking directly at anything. All you see are images reconstructed by your brain from the input of the two very shitty cameras you have in your head.

[–] [email protected] 4 points 2 months ago (1 children)

No, a lens and a screen are optically quite different.

[–] [email protected] -1 points 2 months ago

"screen door slams, Mary 's dress sways."

[–] [email protected] 2 points 2 months ago (1 children)

All the snarky well-actuallys on an unserious community really make me want to browse Lemmy more

[–] [email protected] 0 points 2 months ago* (last edited 2 months ago) (1 children)

I know, they're great, aren't they? 😛 Sorry if I came off snarky.

[–] [email protected] 2 points 2 months ago

For the record you weren't the one I was criticizing