Negative Refraction

[cube137]

https://en.wikipedia.org/wiki/Negative_refraction

http://www.cmth.ph.ic.ac.uk/photonics/Newphotonics/pdf/DRS&JBP_final_.pdf

Supposed the nature of light is altered and light itself cause negative refractive index in normal lenses.. what would we see with our eyes, lenses, binoculars? What would be the appearance of objects?

 

[Khashishi]

The angles don't change in Snell's law if you replace all indices of refraction by negative numbers. Only where you have an interface between a negative and positive index medium do strange things happen.