Invisibility: Theory & Practice

http://timeandquantummechanics.comInvisibility: Theory & Practice - Balticon, May 25th 2013
Invisibility:
Theory &
Practice
John Ashmead
Monday, June 3, 13

http://timeandquantummechanics.comInvisibility: Theory & Practice - Balticon, May 25th 2013
Invisibility:
Theory &
Practice
John Ashmead
And catch “Your Lying
Eyes” with Stephen
Grande at 5pm!
Monday, June 3, 13

Invisibility: Theory & Practice - Balticon, May 25th 2013 http://timeandquantummechanics.com
Transparent
Motives
Monday, June 3, 13

Transparent
Motives
•Wicked cool
Monday, June 3, 13

Transparent
Motives
•Wicked cool
•Very practical:
not just for war
anymore!
Monday, June 3, 13

Transparent
Motives
•Wicked cool
•Very practical:
not just for war
anymore!
•And of great
scientiﬁc value
Monday, June 3, 13

Outline
Monday, June 3, 13

Outline
•A brief history of
invisibility
Monday, June 3, 13

Outline
invisibility
•Reﬂections on
materials
Monday, June 3, 13

Outline
invisibility
•Reﬂections on
materials
•War, peace & the
future
Monday, June 3, 13

The Invisible
Man
“If a sheet of glass is smashed, Kemp, and beaten into a powder, it
becomes much more visible while it is in the air; it becomes at last an
opaque white powder. This is because the powdering multiplies the
surfaces of the glass at which refraction and reflection occur. In the
sheet of glass there are only two surfaces; in the powder the light is
reflected or refracted by each grain it passes through, and very little
gets right through the powder. But if the white powdered glass is put
into water, it forthwith vanishes. The powdered glass and water have
much the same refractive index; that is, the light undergoes very little
refraction or reflection in passing from one to the other.” -- Griffin
…
"Yes, yes," said Kemp. "But a man's not
powdered glass!"
Monday, June 3, 13

Sucker Bet
Monday, June 3, 13

The last cry you hear
could be “Mimicry”
Monday, June 3, 13

The last cry you hear
could be “Mimicry”
Yellow
touches
red, you
be dead.
Red
touches
black, eat
Cracker
Jacks.
Monday, June 3, 13

Spicebush swallowtail
Monday, June 3, 13

Camouflage
“The soldiers
of France will
never
abandon
their
pantaloons
rouge!”
Monday, June 3, 13

Camouflage
Modern camouﬂage began in
1915, when, after a crushing
defeat by the Germans, the
French army abandoned their
stylish white gloves and red
pantaloons and enlisted a cadre
of artists to develop stealthier
attire. The U.S. followed suit in
1917. In addition to hand-
painted uniforms, these
camouﬂeurs created false
bridges, decoy tanks, and, as
seen above, paper-mache horse
carcasses that snipers used as
blinds.
Monday, June 3, 13

Dazzle
Monday, June 3, 13

Dazzle
•Ships in WWI &
WWII
Monday, June 3, 13

Dazzle
•Ships in WWI &
WWII
•Confusion to the
enemy
Monday, June 3, 13

Dazzle
•Ships in WWI &
WWII
•Confusion to the
enemy
•Moral boost at
least
Monday, June 3, 13

Stealth
Monday, June 3, 13

Why so Boxy?
Monday, June 3, 13

Why so Boxy?
•Reﬂections angle
away from source
Monday, June 3, 13

Why so Boxy?
away from source
•Also, paint eats
radar waves
Monday, June 3, 13

Why so Boxy?
away from source
•Also, paint eats
radar waves
•But, hard to ﬂy
Monday, June 3, 13

Why so Boxy?
away from source
•Also, paint eats
radar waves
•But, hard to ﬂy
•And, crashes a lot
Monday, June 3, 13

Monday, June 3, 13

Pay no attention…
Monday, June 3, 13

Physics of
invisibility
Monday, June 3, 13

Physics of
invisibility
•Invisibility cloaks
Monday, June 3, 13

Physics of
invisibility
•Negative refractive indexes
Monday, June 3, 13

Physics of
invisibility
•Metamaterials
Monday, June 3, 13

Physics of
invisibility
•Metamaterials
•Optical transformations
Monday, June 3, 13

Physics of
invisibility
•Metamaterials
•Optical transformations
•General relativity helps make it simple?
Monday, June 3, 13

Invisibility Cloaks
Monday, June 3, 13

Out of mind, out of sight
Monday, June 3, 13

"Of course: I've been
investigating the
mystical causes of
invisibility when I
should have looked at
the quantum
mechanical!" – Rupert
Giles
Monday, June 3, 13

"Of course: I've been
investigating the
mystical causes of
invisibility when I
should have looked at
the quantum
mechanical!" – Rupert
Giles
"I think I speak for
everyone here when I
say 'huh?'" – Buffy
Summers
Monday, June 3, 13

Lighten Up!
Monday, June 3, 13

Lighten Up!
•Slow light
Monday, June 3, 13

Lighten Up!
•Slow light
•Light that goes faster than light
Monday, June 3, 13

Lighten Up!
•Slow light
•Stopped light - light that doesn’t go at
all
Monday, June 3, 13

Lighten Up!
•Slow light
•Stopped light - light that doesn’t go at
all
•Backwards light
Monday, June 3, 13

Cat’s eyes
Monday, June 3, 13

Fermat’s
principle
Direct but slow
Faster
Monday, June 3, 13

Fermat’s
principle
Direct but slow
Faster
Fastest!
Monday, June 3, 13

Simple Lens
Monday, June 3, 13

Lüneberg Lens
Monday, June 3, 13

Positive
Refraction
Monday, June 3, 13

Negative Refraction
Monday, June 3, 13

http://www.loa.espci.fr/cargese2009/Cargese2009_Pendry.pdfInvisibility: Theory & Practice - Balticon, May 25th 2013
Time Reversal
Monday, June 3, 13

Negative cancels
positive
Monday, June 3, 13

Super lens
Monday, June 3, 13

Monday, June 3, 13

Warping space
Monday, June 3, 13

Like water
around a rock…
Monday, June 3, 13

Hiding a lump
under the carpet
Monday, June 3, 13

Invisible Tanks
Monday, June 3, 13

Buffy must explain to Willow and Amy
that their invisibility spell doesn't work
so well with clothes on
Monday, June 3, 13

•Trafﬁc light
visibility
Monday, June 3, 13

•Trafﬁc light
visibility
•Earthquakes
avoidance
Monday, June 3, 13

•Trafﬁc light
visibility
•Earthquakes
avoidance
•Locating
reactor core
with muons
Monday, June 3, 13

Black holes in
the laboratory
Monday, June 3, 13

Black holes as
lenses
Einstein Rings
Monday, June 3, 13

Time Cloak
Monday, June 3, 13

Seeing the
invisible
Monday, June 3, 13

Seeing the
invisible
•It’s all about the math
Monday, June 3, 13

Seeing the
invisible
•Brains at play
Monday, June 3, 13

Seeing the
invisible
•Brains at play
•Any sufﬁciently
advanced science will
look like magic
Monday, June 3, 13

Be Seeing You
Monday, June 3, 13

Be Seeing You
•Forbes - Dazzled & Deceived - 2009 [Fun]
Monday, June 3, 13

Be Seeing You
•Perkowitz - Slow Light: Invisibility,
Teleportation, & Other Mysteries of Light -
2011 [Solid]
Monday, June 3, 13

Be Seeing You
2011 [Solid]
•Beech - Physics of Invisibility: A Story of Light
& Deception - 2011 [Lots of pictures]
Monday, June 3, 13

Be Seeing You
2011 [Solid]
•Beech - Physics of Invisibility: A Story of Light
& Deception - 2011 [Lots of pictures]
•Leonhardt - Geometry & Light: Science of
Invisibility - 2010 [Technical]
Monday, June 3, 13

Invisibility: Theory & Practice

Recommended

Recommended

More Related Content

Recently uploaded

Recently uploaded (20)

Featured

Featured (20)

Invisibility: Theory & Practice