Microblog Posts

I found a couple of videos exploring the concept of refractive index — why light seems to slow down in different mediums.

In the first, the creator reasoned intuitively that light doesn't really slow down. She built a simple home experiment to prove it, but the results showed the opposite. In the second, she set out to understand why those observations actually made sense.

• Does light actually slow down in water?
• I don't know why light slows down in water

I'm learning about lambda calculus, the mathematical foundation of Lisp. It defines an incredibly expressive system. The Church encodings finally clicked for me.

TIL that in Magit buffers, pressing \ (or M-x evil-collection-magit-toggle-text-mode) activates text-mode. This mode enables standard visual motions that are unavailable in Magit buffers.