Diffusion, Electrophoresis, and Electric Field Visualization.

The article in the Physics Teacher journal discusses three lab activities involving the movement of food coloring dye through agar-agar gel, focusing on diffusion, electrophoresis, and electric field visualization. These experiments are designed to bridge physics, biochemistry, biology, and forensic science disciplines. The diffusion experiment highlights the random movement of particles from high to low concentration, while the electrophoresis experiment demonstrates the migration of DNA fragments based on size and charge. The visualization of electric fields allows students to understand the relationship between equipotential lines and electric field lines. Overall, these labs provide hands-on experiences for students to explore the principles of physics in a practical and engaging manner. [Extracted from the article]