How Do Thermal Imaging Goggles Work?

Movies like Predator reveal how useful thermal imaging goggles can be, but why do hot objects give off infrared radiation to begin with?

Hosted by: Michael Aranda
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[XempireX]

you never told us how does thermal imaging goggles work. all you explained is why objects glow and why they glow in the infrared section. you never talk about how does the lens detect infrared and how is it converted to visible light.

[eniayoayoola]

Great vid as always SciShow! Although that doesn't really explain how the goggles actually detect and visualize infrared radiation.

[sebastianelytron]

But can they see through thermal underwear?🤔

[Master_Therion]

First, Olivia, now even Michael Aranda 2:08 has that "certain glow."
Geez, is everyone at SciShow pregnant?

[TopiasPaljakka]

I used thermal imaging goggles once and I happened to look at a white board and was surprised to see my own reflection looking back. Now I'm wondering as to why don't white boards show reflections in visible light? How do mirrors work anyway? Black doesn't reflect anything and white is supposedly the opposite yet I don't see my reflection in white. Please explain. Thanks!

[nfrandom]

So Thermal Goggles should be able to detect my mixtape?

[arita]

so kevin abstract dm them and begged for them to do this, right?

[RangerRuby]

I found the part where he said that if you were in the coolest part of space you would want microwave goggles and if you were on an edge of a Blackhole you would want X-ray goggles super interesting! Thanks, SciShow for this cool video!

[m.s.e.advanced]

Sheet music boss and scishow post at almost the same time every day

[thstroyur]

To complement the video: heat can propagate as thermal radiation, the frequency of which depends on the kind of molecular motion going on; so, microwave heat usually comes from molecules rotating - while UV heat is mostly from electronic excitations. Infrared itself has to do with molecular vibrations. These associations are useful for spectroscopy, where we use the radiation to infer these kinds of molecular properties

[mikedavies]

Hey, great video. Thank you for that, I had fun. I’ve been looking for more content and quantity videos to satisfy a strange urge to understand some of the fascinating science around invisible technology. There is a lot of it but I’m usually stumped when I look at it on paper. Well done, keep up the good work.

[SlyPearTree]

The latest Predator movie is more enjoyable with beer goggles from what I've read.

[Cythil]

Could have specified that is the far infrared spectrum that gives off the most. The near infrared which digital cameras (if not filtered out) and infrared sensors pick up on do not work well as thermal vision. Also why thermal cameras cost a lot more then you regular digital camera. A lot of people seems to confuse the near and far infrared spectrum.

thought hank was about to drop some science on Iridescense

[owenweiss]

Predator terminates expendables in the battlefield 17 😂

No bolometers? No Peltier-Seebeck effect? No... information about how does thermal imaging works?

[greeksquad]

“It’s kinda of a coincidence”
-Every scientist ever

[NicWalker]

Predator terminates Expendables into Oblivion XVII.... I'm

[TheBoundFenrir]

A great example of this is watching metal heat up in a forge: as it heats up, the light it gives off transitions into the red spectrum, and then into orange and yellows, and from that point on it's giving off so much light we can't distinguish individual colors anymore, and it looks "white" hot because it's transmitting several different visible wavelengths at high intensity. If you kept heating it up, you'd eventually get blue light coming off it as well, not you'd be able to tell without proper equipment (and depending on the metal in question, you may need a container for the liquid metal before you get to that point)

[cup_check_official]

How Do Thermal Imaging Goggles Work?
By tracking my hotness B-)