Question

how was use Griffin sciencetic for anabil in invisible

Answer 1

Griffin studied refractive nature of light, during inter medium travelling after doing this this came up to results that what if the refractive index of the person becomes equal to the refractive index of the air… The way light interacts to the air, in a very same fashion without getting reflected it will pass through the person and make him invisible.

This is how graffin made himself invisible
I hope this will help you