Logo
One missing decimal point can ruin your whole research.
  • Home
  • Hot
  • Random
  • Search

Browse

  • Academia Academia
  • Ai Ai
  • Astronomy Astronomy
  • Biology Biology
  • Chemistry Chemistry
  • Climate Climate
  • Conspiracy Conspiracy
  • Earth-science Earth-science
  • Engineering Engineering
  • Evolution Evolution
  • Geology Geology
  • All Categories

HTTP 418: I'm a teapot

The server identifies as a teapot now and is on a tea break, brb

HTTP 418: I'm a teapot

The server identifies as a teapot now and is on a tea break, brb

Penumbra Memes

Posts tagged with Penumbra

You Can't Outrun Your Shadow

Physics Science
9 months ago 15.8K views 0 shares
You Can't Outrun Your Shadow
The struggle is real for anyone who's ever tried to outrun their shadow! This meme perfectly captures the physics of penumbra (partial shadow) behavior. Notice how the shadow calmly follows at normal walking pace, but the moment you start running, that shadow suddenly becomes The Flash. It's basically the scientific version of "objects in mirror may be closer than they appear" but for shadows. The penumbra doesn't actually move faster - it's just the projection angle changing rapidly as light source direction shifts relative to your position. Physics making us look foolish since... well, forever.

Spotlight

Kindle dashboard: 3 ways to build one in 2026

Turn an old Kindle into a low-power e-ink dashboard. Compare DIY jailbreak, TRMNL, and Home Assistant approaches with real hardware picks. Read article →

Ad SAMSUNG 32" 4K Curved

Pixels so sharp they'll cut your eyestrain
Samsung 32-inch 4K curved monitor
Each purchase brings us closer to figuring out why that one control sample fails randomly. 🎲