[Electricity crackling, Awti humming]
[Awti] Huh?
[Awti gasps with glee, chuckles in anticipation]
[Awti grunts, buttons click]
[Awti] AHH!!!
["KnowThat?!" Title Music]
[Awti] Okay, question: 
Why is everything black and white?
[Jeremy] Question: Why are you touching my machine?
[Awti] What is your machine?
[Jeremy] This is an electromagnetic radiation generator.
[Awti] Oh! An an elr#^(#mumblemumble...) ... what is that?
[Jeremy sighs] It's an 
ELECTROMAGNETIC RADIATION GENERATOR!!!
[Awti] WHOA!! Yeah, that! What does it do?
[Jeremy] Okay. Electromagnetic radiation 
is a type of energy that radiates. It's comprised of
two fields: the first is electric, which travels
in waves. The second is magnetic, which also
travels in waves but perpendicular to the
electric waves. Put them together and you've got
"electromagnetic radiation". 
Now, electromagnetic radiation has a range that --
[Awti] Oh! Yes, yes yes. You're talking about 
the "spectrum". Now, that has a range of frequencies...
[Jeremy] Right, right...
[Awti] On the low end of the spectrum,
you have low-frequency, long-wavelength waves
called "radiowaves". And you might find this in, say, a radio...
[Jeremy] Whoa! What?!...
[Awti] Now, microwaves have
a higher frequency and a shorter wavelength.
And these might be in, say, 
cell phones or maybe Wi-Fi in your laptop...
[Jeremy] Oh! Where did this come from?
[Awti] Ultraviolet radiation has an even higher 
frequency, say, the sun's radiation that gives you a tan...
[Jeremy] ...seriously?
[Awti] Now, X-rays have an even shorter wavelength.
This is used in, say, taking photographs of the bones...
[Jeremy] AGH! Come on...
[Awti] Okay. So I get this concept of 
'electromagnetic radiation spectrum', but your machine, Jeremy,
doesn't work. I flipped all the switches, I didn't see it do anything!
[Jeremy] No, nonono. My machine works just fine.
You see, the electromagnetic radiation spectrum
is not entirely visible to the human eye.
In fact, we can only see less than 1% of it.
Now, this tiny sliver is what we call "Visible Light."
[Awti] 'Visible light'... Oh!  
That's why everything is black and white?!
[Jeremy] That's right.
[Awti] Oh, and that's why all the colors are gone.
Okay, well then, how do we see color?
[Jeremy] Okay, hold that thought. Now, you 
see this glowing white orb? That is visible light.
In the entire spectrum that we referred to,
that small portion is what we can see.
Now, in there, is a bunch of frequencies. 
If you look closer, *that* is what we interpret as "color".
[Awti] Cooool!
[Jeremy] Now, if I were to say 
"my shirt is blue", what I'm really saying is that my shirt
absorbs all of the visible light
spectrum frequencies EXCEPT for blue.
[Awti] Oh, so when that frequency
hits my eye, then I see the color blue. Huh!
[Jeremy] Yeah, and if I say "my shirt is yellow", what 
I'm saying is that it absorbs all of the colors except for yellow --
[Awti] OH! Yeah! I know how this part works!  Uh, so in the
back of your eye, you have a bunch of what you call "cones".
Now, there's actually three kinds
of those cones: You've got blue, red, and green.
And when that yellow frequency hits
the cones, then the red and the green ones
activate and your brain
interprets that as seeing the color "yellow"!
[Jeremy] Actually that's not... 
uh, yeah. That's actually correct... good job!
[Awti] Ayup, well, that's what I do!
[Jeremy chuckles] So that's the 
"electromagnetic radiation spectrum". Cool!
[Awti snorts excitedly]
[Jeremy] Uh... What are those?
[Awti] Oh what, these? They're my 
ELECTROMAGNETIC RADIATION GOGGLES!! YEAH!! WOOOO!
[Jeremy] Uh.... that's not a thing.
[Awti] Alright... ha! [button clicks]
[Jeremy] Whoaaa! Whoa, whoa, whoa --
[Awti] Ahhhh, I can see eeeeverything!
[Jeremy] Uh, Austin. Austin! Hold on--
[Awti] Alright... [button clicks]
[Jeremy] Okay, ok ok, I can't see anything. Austin, c'mon.
[Awti] What about this one? [button clicks] .... soo cooool!
[Jeremy] Okay, don't touch the gamma!!
[Awti] Wha.. oh gamma?
[Jeremy] No no no!
[Awti] Oh gamma? Alright you got it!
[Jeremy] No, don't touch the gamma, 
it's really dangerous!! No! NOOOOOOO!
[ ... ]
[Awti] ... heheh... hi.
[Jeremy] AAAUSTIIIIIN!!!
["KnowThat?!" Title Music]
