( english version )

Physics C ( 5 CFU ) Finalità

The purpose is to provide the students with basic concepts on magnetism, classical electromagnetism, wave motion, and optics. The student is expected to achieve the above mentioned concepts and to be able to apply them in solving simple problems.

Programma

Magnetic field definition. The Lorentz force. Circular and helicoidal paths. Applications: mass spectrometer and Hall effect. Examples of magnetic fields. Magnetic force on current carrying wires. Torque and magnetic dipole moment for current carrying loops.

Magnetic fields induced by current carrying wires. Force between current carrying wires. Application: the electromagnetic rail gun. The Ampère’s Law. Solenoids and toroids. Coil related magnetic dipole.

Induction Faraday’s law. Lenz’s law. Induction and energy transfer. Induced electric fields. Inductance. Autoinduction. RL circuits. Magnetic field energy density.

Earth magnetism. Magnetism and electrons. Diamagnetism, paramagnetism, and ferromagnetism. Induced magnetic fields. Displacement currents. Maxwell equations.

LC oscillation and damped oscillations. Alternate currents. RLC circuits. Transformers.

Wave function and wave equation. Phase and group velocity. Longitudinal and transverse waves. Harmonic waves. Superposition principle. Interference of harmonic waves. Steady waves. Wave propagation in elastic media. Sound waves. Wave energy and intensity.

From the Maxwell’s equations to the electromagnetic wave equation. Propagation velocity. Electromagnetic spectrum. Energy. Poynting vector. Electric dipole radiation. Polarised waves.

Huygens’ principle. Light rays. Reflection and refraction laws. Light dispersion. Prisms. Total internal reflection. Optical fibres.

Mirrors. Spherical diopters. Thin lenses. Lens aberrations. Centred paraxial optical systems.

Interference from slits and thin films. Fraunhofer diffraction. Diffraction grating. Dispersion and resolving power. Light polarisation. Polarisation by reflection and selective absorption.

Attività d'esercitazione

Guided exercise solution in classroom will be routinely performed.

Modalità d'esame

A written test covering the whole course program including exercise solving is followed by a verbal one.

Propedeuticità

Mathematics. Calculus. General Physics A-B.

Testi consigliati

D. Halliday, R. Resnick, J. Walker, Fondamenti di Fisica (vol. unico), Casa Editrice Ambrosiana (english version available).

R. A. Serway, Principi di Fisica (vol. unico), ediSES (english version available).

R. A. Serway, Principi di Fisica (vol. unico), ediSES (english version available).