document samplePointStrategy for PickupCoilScreenModel, #161

phetsims · Apr 18, 2024 · 074bfd9 · 074bfd9
1 parent 41c6254
commit 074bfd9
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/js/pickup-coil/model/PickupCoilScreenModel.ts b/js/pickup-coil/model/PickupCoilScreenModel.ts
@@ -60,6 +60,10 @@ export default class PickupCoilScreenModel extends FELScreenModel {
       position: PICKUP_COIL_POSITION,
       maxEMF: 2700000, // see PickupCoil.calibrateMaxEMF
       transitionSmoothingScale: 0.77, // see PickupCoil.transitionSmoothingScaleProperty
+
+      // To avoid inducing significant (incorrect) EMF when the magnet is moved vertically when inside the coil,
+      // use sample-point spacing that results (approximately) in the same number of sample points always being
+      // "inside" the magnet. See https://phet.unfuddle.com/a#/projects/9404/tickets/by_number/248.
       samplePointsStrategy: new FixedSpacingSamplePointsStrategy( barMagnet.size.height / 10 ),
       coilOptions: {
         currentSpeedScale: 3