Technology · Beginner · 4 steps

How GPS Finds You

Taught by Emma · Memes, slang, zero cap

See how your phone finds its position from satellites. One signal puts you somewhere on a circle, two leave two possible spots, and a third locks the fix: trilateration. Drag a signal's travel time to see how a tiny timing error moves your location.

Make your own lesson

Free, no account needed. Opens right here; the same lesson runs in the app with narration in Emma's voice.

Open full screen

What you will learn

  • Distance from signal travel time (d = c × t)
  • Why one or two satellites are not enough
  • Trilateration with three circles
  • How timing errors become position errors

Lesson outline

  1. One Satellite = Pure Guesswork
  2. Two Satellites: Down to Two Suspects
  3. Hunt the Fix: Three Circles
  4. Trilateration Vibe Check

Each step has a short narration, something to drag or toggle, and the lesson ends with a quiz. You can go back to any step.

More lessons

Physics · Beginner

Electrical Circuits Fundamentals

Learn how electric circuits work by building them. Flip a switch to close the loop, change two resistors and watch Ohm's law respond, compare series and parallel wiring, and charge a capacitor to see the RC time constant. Tesla narrates five hands-on circuits and a five-question challenge.Taught by Tesla · 6 stepsPhysics · Intermediate

Kepler's Second Law

Ride along with a planet on a stretched orbit: it races past the Sun and crawls far away, yet sweeps equal areas in equal times. Paint your own wedges, measure them, and see why Kepler's second law holds. Einstein narrates.Taught by Einstein · 3 stepsPhysics · Intermediate

Projectile Motion

Drop one ball, throw another, fire a cannon: sketch the arcs the way Leonardo filled his notebooks, and find the angle that throws the farthest. Da Vinci shows that horizontal and vertical motion keep separate accounts.Taught by Da Vinci · 4 steps

Discover more topics