how do reflector bands work?

[dpopiz]

you know the sparkly reflective fabric bands you wear at night when you're riding a bike?

how do those work?

 

[Heisenberg]

They're made of reflective material??

What are you asking?

 

[dpopiz]

but how does the reflective material work? I mean it's like it somehow sacrifices moderate reflection of light from all angles to give super reflection of light from one angle

 

[Howard]

The same way stop signs work.

Now Google it.