Highlighting modes of vibration by sinusoidal excitation.
Simplified model of excitation of a column of air through a reed or a bevel : selection of frequencies emitted by the length of the air column.
Analytical model: relations conjugation and thin converging lens magnification. Monochromatic light, polychromatic light, frequency and color.
Propagation of light in transparent media, index of the medium.
The weight P and the mass m of an object are two quantities of different kinds and they are proportional. The relationship of proportionality is expressed by P = mg An object has: - An energy position close to the Earth; - Energy of motion called kinetic energy. Movement of a solid rotation around a fixed axis, angular velocity - An approach to Newton's laws applied to the center of inertia 1st law : The principle of inertia This principle is true that in some benchmarks These repositories are called Galilean.