meta2:
-DNG, ENG, MNG, DNG
-Backward Propagation
-Negative Refraction
-Snell's Law (n<0)
-Pendry Perfect Lens ????
-Material Dispersion ????
-The Split Ring Resonator (SRR) ????

meta4:
-slide 2: what are metamaterials?
-slide 4: uses
-slide 5: invisibility
-slide 6: Limitations

meta5:
-How to make Metamaterials
-Applications of meta
-App: Metamaterial luneberg-Lens antenna

meta6:
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-Introduction to negative index of refrection (+history)
-Classification of materials: DNG, ENG, MNG, DNG
-What is different? *Direction. *Backward Propagation. *Snell's Law (n<0).
*Fermat Principle in DNG Media:
	The optical length of the actual path chosen by light 
	maybe negative or null.
	The path of light is not necessary the shortest in time.
*Other Effects in DNG Media:
	Inverse Doppler effect
	Backward Cerenkov Radiation
	Negative Goos-Hänchen shift
-How to make Metamaterials?
-Pendry Perfect Lens.
-Applications