Thoughts about invisibility

If science got to the point where they can make people invisible - not just with some fancy clothes, but their actual body, what would it look like and behave?

The most interesting and weird thing would be what happens when stuff got inside the body, like food. Would the food remain visible through the body and could we see the whole process of it getting digested and coming out the other side, or would it vanish as soon as it entered the mouth?
I think the first explanation would be more logical, but what would it look like if the second one was true? If we, say, inserted a finger halfway inside the mouth, and the part inside vanished, and we looked at it from the other side, would it look like it's been cut off? Would it be transparent in some way?
If a pregnant woman was made transparent, would the baby become transparent, too? Or would we see it develop? If it depended on the baby being present when the woman was made transparent, would the baby be visible inside the body if the woman was made transparent, then impregnated?

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I hope we never see science get to the point where things like Invisibility or telekinesis become possible since i cannot even begin to fathom the types of sick crimes we would see happen daily.

I mean powers like Invisibility would make trying someone in the court of law simply impossible.
 
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If only the skin was made transparent, then we'd be able to see all of your organs.
 
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Based on Space Quest VI I can assure you whatever enters the invisible monster, becomes invisible.
Considering Toru must eat and digest but nothing is visible, My Hero Academia also confirms this observation.

@Abu_Senpai well, Plato wrote something about that regarding the Ring of Gyges
 
Aw I thought we were going to have a psychological discussion (short version is it does not do well for most people and creatures -- stick a VR set on and have it paint out your hands or something).

Most invisibility systems are envisaged as bending light around the object to be made invisible (which also means it is totally dark, or at least without any inside the invisibility envelope) or taking light from one side and projecting it to the other (harder as you have the angle of the observer problem to deal with). To that end food would vanish as soon as it passed through the mouth guard/area. Similarly anything contained within it (shit, sprogs, spooge, semi inserted finger) would all vanish.

I mean powers like Invisibility would make trying someone in the court of law simply impossible.
Yeah I mean we never solve crimes without video and photo evidence.
 
You could still prosecute Invisible people, even with video evidence. All you need is thermal detectors or whatever they're called to tell the general shape and size of the person. That along with some good forensic science could put the right person behind bars.
 
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Remember that science isn't magic; if we got to the point where people could turn "invisible", it would most likely only be on a level of advanced camouflage at the skin level. It most likely wouldn't shift in real-time (but rapidly enough to be useful, see octopuses for an example), and anything being ingested would just be concealed
 
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There is a way, but not actual invisibility. Rochester has an article on a magnifying glass that could bend light to make you think your finger or a small object wouldn't be there. So yeah.

http://www.rochester.edu/newscenter/watch-rochester-cloak-uses-ordinary-lenses-to-hide-objects-across-continuous-range-of-angles-70592/
 
All you need is thermal detectors or whatever they're called

Heat is light so if you can bend visible light around the object suitably well you can probably do infra red as well. It is not without problems (a human is a 100W heater) so you either radiate more or try to sink it for a while but it is not insurmountable.
 
Just look it up, what you can "see" regarding heat, as with heat visor, are the emissions of heat through radiation, that is, electromagnetic waves in the infrared spectrum (just below the visible spectrum). If your eyes were tuned for that spectrum, you could see heat actually like some animals do, unfortunately your eyes are tuned for the "visible" spectrum (so called because that is what they can see, doh), that is you can't see either infrared or ultraviolet, but those still exist!

Anyway, for sources:
https://physics.info/radiation/

PS: But to be more technical, "light" is electromagnetic waves, the same as infrared (thermal radiation), microwaves, wi-fi, radio signals, or going to the other extreme, X-Rays, etc.
 
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It would probably be a lot like this...
It is from The Invisible Man (1933) which is inspired by the H.G. Wells novel with the same name.
 
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if it's external, then refraction of light around the subject would result in anything within the refraction is hidden. would have to be worn tech or skin-deep tech.

If it's internal, then refraction of light through the subject would result in only the subject being invisible, with anything else being visible (like food eaten, probably). It would have to change something biologically, so it would just boild down to "how does it work"? Chances are you'd probably just look like a weird alien rather than completely see-through.
 
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