Lecture
This lecture demonstrates the effects of interference fringes by showing how currents in two horseshoe magnets can either attract or repel each other based on the direction of the current flow, using a 50 Hz variable generator and a switch system to control the current direction. The instructor showcases how the fringes at the interface between the magnets generate either an attractive or repulsive force, highlighting the importance of understanding these fringes in specific experimental setups.