"A double-refractor, for that matter."
* * * * * * * * * *
An interferometer splits light from a single source and then has them converge on a detector. A double-refractor polarizes the light to create two beams in parallel. So Merle's example is subtly different in that Blinky's seeing the same light but refracted to different wavelengths. I'll admit (again): I don't think I'm smart enough to understand the difference.
But what I am smart enough to understand is that Merle Rideout is getting into photography (or soon will, anyway) so he sees Blinky as a photographic or telescopic lens while Ed Addle sees him as just another tool to discover his beloved Æther.
Are their two viewpoints another example of the Theory of Relativity and how two observers can view the same events in different ways? Man, I'm really simplifying one of the most amazing scientific leaps of logic and experimentation of the 20th Century! I should probably just stick to playing video games.
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