Drag, interact & discover the invisible forces
Choose a pole combination, then drag the right magnet toward the left one.
• Unlike poles (N–S, S–N): facing poles attract — they stick together.
• Like poles (N–N, S–S): facing poles repel — they push apart.
Field lines always travel from North to South outside the magnet. Press the button to animate them with direction arrows.
Action: Exhaust gases forced downward. Reaction: Rocket pushed upward. Equal and opposite forces!
Drag the loose wire end to the bulb terminal to close the circuit. Electrons flow and the bulb glows!
Add batteries, connect an iron spoke as resistor, and place a voltmeter & ammeter to measure. Watch how I = V ÷ R changes live!
Alpha particles from a radioactive source pass through a slit, hit a thin gold foil at the center of a circular ZnS detecting screen.
Most pass straight through. Some deflect at angles. Very few (1 in 8000) reflect back!
Explore additional interactive science tools and references.