On Aug 21, 9:15 am, Jerry wrote:
On Aug 21, 2:58 am, Koobee Wublee wrote:

This is an absolute myth. Well, He has had enough with these
bull****s from someone who does not even understand Snell’s law.

You've avoided answering me on the proper thread. If that's how
you insist on behaving, I will copy over my thought experiment
from the Sobral 1919 thread.

Your claim is that a pure gradient refractive index lens, with
no distinct surface, will not focus light, but instead will
merely displace an incident beam without changing its direction.

Yes. You are ****ing stupid if not to be able to see just that.
shrug

The following illustration for high school physics provided by your
buddy, PD, should easily answer this. If you still don’t get it. It
is solely your problem. shrug

http://www.gcsescience.com/pwav23.htm

[rest of irrelevant cyber diarrhea disinfected]