Closest approach of alfa particle‪@LearnPhysicsClasses‬ #cbseboard #upboard

This educational physics lecture explains the concept of the distance of closest approach for an alpha particle during the Rutherford scattering experiment. Key topics covered include: Experimental Setup: Understanding how alpha particles are directed toward a gold foil nucleus and the resulting electrostatic repulsion (1:04-2:32). Energy Conservation: How an alpha particle's initial kinetic energy is converted into electrostatic potential energy at its turning point (4:31-5:16). Mathematical Derivation: A step-by-step calculation to derive the formula for the radius of closest approach based on atomic number (cap Z), elementary charge (e), and kinetic energy (cap K) (8:45-10:23). Atomic vs. Nuclear Size: Insights into how these calculations provide an estimate for the scale of atomic and nuclear radii, specifically referencing magnitudes around 10 to the negative 14 power to 10 to the negative 15 power meters for the nucleus (11:19-11:54).