Connect the laptop to the TV, open this file in Edge or Chrome and choose Full screen (or press F11). No installation, login or connection is required.
Predict → reveal: hide the answer, change an input, ask the class what should happen, then reveal. Labels and motion can be controlled separately. Pause freezes animation, not the controls.
Keyboard: 1 / 2 / 3 switch lessons, Space pauses motion, R resets, F toggles full screen. A focused slider responds to arrow keys.
Principles cross-checked against Evident’s Wave Front Dynamics, Transducer Focusing and Ultrasonic Transducers reference tables. Only these optional links require internet.
Teaching aid, not an inspection simulator or calibration tool. Velocities are nominal; follow your course material and verify actual material velocity in practice.