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Reflective Materials
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NASA Sci Files segment exploring reflective materials, how they are made, and how they work.
Wow, this is neat.
00:00:00
Are we in the right place?
00:00:02
Well, you're in the right place.
00:00:04
I'm Dr. Joycelyn Harrison, and I work here in the Advanced Materials and Processing Branch at NASA Langley Research Center.
00:00:05
But since you guys are in the lab, could you do me a favor and put these safety glasses on?
00:00:11
We have to always remember to use safety first.
00:00:16
Well, we're trying to solve the problem of making our bikes more visible at night, and we want to use reflective materials.
00:00:19
We were hoping you could help us.
00:00:25
Do you know anything about reflective materials?
00:00:27
Yes, here at NASA Langley, we do research on developing reflective plastics.
00:00:29
Here's an example of a reflective plastic film that we developed right here.
00:00:33
Wow, this is really lightweight.
00:00:38
This would look really cool on our bike.
00:00:40
How do you make it?
00:00:42
Well, we start off with this clear polymer solution that has metal ions dissolved in it.
00:00:44
And then we pour it on these glass plates, and then we bake it in these big ovens.
00:00:49
You bake here?
00:00:54
Yes, actually, chemists do bake, but we call it curing.
00:00:56
While curing, the metal ions in the material migrate to the surface of the material, and we end up with a very reflective plastic.
00:00:59
Wow, I thought that only metals were reflective.
00:01:07
Why does NASA use reflective plastics?
00:01:10
Well, you guys come with me, and I'll show you an example of how NASA uses materials just like this.
00:01:13
Come on.
00:01:17
What is this? I've never seen anything like this before.
00:01:22
It's so tall.
00:01:25
This is a reflective antenna.
00:01:27
Actually, it would have to be about five times larger than this to be used in space.
00:01:29
NASA puts antennas like this in space to collect energy or signals for communications and scientific measurements.
00:01:34
Why does it have to be so shiny?
00:01:41
It needs to be reflective so that we can focus the energy to where we want it to go,
00:01:43
like to a location on Earth or to a science instrument on a satellite, for example.
00:01:48
We really need reflective materials, too.
00:01:52
We're trying to make our bikes safer at night.
00:01:55
I don't think we could build anything like that.
00:01:58
Do you have any suggestions for our bike?
00:02:00
Well, what kind of things do you think could help you see your bikes at night?
00:02:02
We had a brainstorming session and came up with a few ideas, like stickers, maybe paint.
00:02:05
Yes, but just make sure that those lights and stickers are reflective so that the light will bounce off them.
00:02:11
You might also consider using some reflective gear.
00:02:17
Gear?
00:02:20
Yes, like reflective vests, helmets, or even tennis shoes.
00:02:21
We'll get started.
00:02:25
Thanks for your help.
00:02:26
We really appreciate it.
00:02:27
Bye, Dr. Harrison.
00:02:29
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- Idioma/s:
- Niveles educativos:
- ▼ Mostrar / ocultar niveles
- Nivel Intermedio
- Autor/es:
- NASA LaRC Office of Education
- Subido por:
- EducaMadrid
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 383
- Fecha:
- 28 de mayo de 2007 - 15:33
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 02′ 30″
- Relación de aspecto:
- 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
- Resolución:
- 480x360 píxeles
- Tamaño:
- 15.12 MBytes