Timeline for Would a material that could absorb 99.5% of light be able to protect someone from Night Vision?
Current License: CC BY-SA 4.0
19 events
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| 7 hours ago | history | edited | Nosajimiki | CC BY-SA 4.0 |
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| 8 hours ago | comment | added | Nosajimiki | @breversa descriptions added. | |
| 8 hours ago | history | edited | Nosajimiki | CC BY-SA 4.0 |
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| 9 hours ago | comment | added | breversa | A description of each photo would help. For instance, is the first picture meant to show the same thing as the second or third? | |
| 11 hours ago | comment | added | Nosajimiki | @gs Ah, that makes since. nice. | |
| 21 hours ago | comment | added | Mon | Saw an interesting You Tube video where some guys tried to do a little (daytime) experiment where one of them emulated Arnie from the original Predator movie and rolled around in mud and then had to try & hide from the rest of the team who used commercially available IR gear to play 'Predator'. The mud actually (seemed to) work quite well for an extended period of time albeit they were in a hot/dry environment. The gear they were using apparently couldn't detect the 'prey' even at distances of only a few meters as long as he remained still & under cover. (Was it faked? who knows?) Go Arnie! | |
| yesterday | comment | added | g s | (Or if there's an IR source behind you, you're visible as a shadow.) | |
| yesterday | comment | added | g s | @Nosajimiki the transparency of the water is irrelevant here, it's the effect of the water on the temperature of the radiative surface and hence the radiation emitted from the surface. If you stand behind a big aquarium (with IR transparent walls), a TIC will see you (or at least a fuzzy blob). If jump into the aquarium, you're invisible: water is a great conductor with a high heat capacity and your subcutaneous fat is a pretty good insulator, so your skin rapidly reaches dynamic equilibrium barely above the temperature of the water. If somebody shines an IR flashlight at you, visible again. | |
| yesterday | comment | added | DJMcMayhem | @Altarious Here's a nice introduction to how various forms of night vision actually work and what their strengths and weaknesses are: youtube.com/watch?v=UAeJHAFjwPM | |
| yesterday | history | edited | Nosajimiki | CC BY-SA 4.0 |
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| yesterday | comment | added | Nosajimiki | @gs To my understanding, you will still see the person, but they may appear a bit blurred out. While water is 10 times less transparent to IR light than visible light, you can still see IR emissions through small amounts of water even if the water itself is the same temp as the room. | |
| yesterday | comment | added | g s | If op is trying to hide a character from a TIC, wet full body (including face) clothing works just fine as an air conditioned outer layer for humans as long as the humidity isn't super high, thanks to the magic of evaporation. | |
| yesterday | vote | accept | Altarious | ||
| yesterday | history | edited | Nosajimiki | CC BY-SA 4.0 |
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| yesterday | comment | added | Altarious | Oooooh, now see I learned something new today. | |
| yesterday | comment | added | Nosajimiki | @Altarious Yes, but with a tiny caveat. "Night vision" typically means IR (heat vision), but there are also "low-light" cameras that simply enhance the image from available light. These are best fooled by traditional camouflage. | |
| yesterday | history | edited | Nosajimiki | CC BY-SA 4.0 |
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| yesterday | comment | added | Altarious | So Night Vision is actually a form of Heat Vision? | |
| yesterday | history | answered | Nosajimiki | CC BY-SA 4.0 |