Science of Superheros: Invisibility and Camouflage

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Information about Science of Superheros: Invisibility and Camouflage

Published on December 3, 2008

Author: mwinikates

Source: slideshare.net

Description

Introductory presentation for a hands-on program exploring human and natural approaches to invisibility and camouflage.

Science of Superheroes: Invisibility and Camouflage August 2008

Superhero Invisibility: How do they get that way? Chemical potions Radiation “ Cloaking devices” Warping space to bend light around an object

Chemical potions

Radiation

“ Cloaking devices”

Warping space to bend light around an object

Do any of these techniques actually work?

“ Cloaking” with Metamaterials Certain materials act like a ‘cloak,’ bending the microwaves so that they seem to pass through the object. This is hard to do with visible light because light waves are even smaller than microwaves.

Nature’s Invisibility: Camouflage Concealing coloration Uses the same color as its environment Disruptive coloration Breaks up its outline so it doesn’t stick out Mimicry Looks like other distasteful or dangerous beings Disguise Blends in with its surroundings

Concealing coloration

Uses the same color as its environment

Disruptive coloration

Breaks up its outline so it doesn’t stick out

Mimicry

Looks like other distasteful or dangerous beings

Disguise

Blends in with its surroundings

Thorns or Bugs? Treehoppers

Other Disguises

Concealing coloration

Disruptive Coloration How many zebras are there?

How many zebras are there?

Now you see him…

Human styles of camouflage What environments do these camouflage outfits fit?

What environments do these camouflage outfits fit?

Octopi and other Sneaky Cephalopods http://video.google.com/videoplay?docid=-9203354934457918497 http://video.google.com/videoplay?docid=1888654667283528144&hl=en

http://video.google.com/videoplay?docid=-9203354934457918497

http://video.google.com/videoplay?docid=1888654667283528144&hl=en

Colorblind Cuttlefish

Harry Potter’s Invisibility Cloak? Not quite yet…

A complicated system The cloak is made of the same reflective beads that are used on movie screens.

The cloak is made of the same reflective beads that are used on movie screens.

How else do we see things that can’t be seen?

Other ways of seeing the invisible Thermal Imaging

Thermal Imaging

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