If you think about it from a state of matter perspective, it might become much easier to go to the answer or it could just end up increasing our curiosity. Either way we'll be at a better state of knowledge or understanding. For what it's worth, it's not invisible. But I cannot explain you that because you might not understand it, I would say. https://youtu.be/36GT2zI8lVA - watch it, please?.
How come vaccum is invisible?
I think we see through vacuum, we don't observe the vacuum itself. That's why we can see other planets. My guess is that if vacuum was replaced by air it would be much harder to see through it
Follow-up for those who say it is invisible: what's the biggest invisible thing / smallest visible thing for you?
Everything about universe looks different at different spatiotemporal.
Not sure if I follow. Can you elaborate
Spatiotemporal is like perspectives, if you look at a situation from different space and time it seems different every time, similarly universe looks different for a cat/dog/human it is different for every naked eye. Sometimes there is no reality other than what is perceived by your eyes and brain.
Is it safe to get high in the shower?
Arguing definitions is a fool's errand. I don't think anyone here disagrees about the facts of the physical phenomena, therefore there is no disagreement. If you don't already agree that it's a meaningless question, I encourage you to read this: https://www.lesswrong.com/posts/7X2j8HAkWdmMoS8PE/disputing-definitions
Interesting article. In my mind this is more about people's working definition than which definition is correct (which is what comes up in the article). It's an experiment to collect empirical stats on using the term invisible, not a shouting match about which definition is 'superior'. I never meant to imply anyone is incorrect, I'm just interested in the consequences and inconsistencies of both definitions
Thanks for clarifying. It wasn't clear to me from reading the post.
SNWE (Saturday night weed effects) 🤔
I saw it today, around the corner
The vacuum is not invisible either, it is full of the cosmic microwave background radiation at one level and the quantum froth at another.
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No. Molecules scatter light off. That's why a clear sky is blue.
Is anything invisible then?
It depends on the wavelength of the light (em radiation). Air is pretty much invisible to radio waves for example.