Waves and Signals

Waves and Signals Frequency is the number of occurrences of a repeating event per unit time. It is also referred to which frequency, emphasizes the contrast to spatial frequency and angular frequency. as temporal reflected wave Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It detect aircraft, ships,spacecraft, guided missiles, motor vehicles, weather formations, and terrain. Objec can be used to ender/ eceiver original wave distance r Elemania In this type of modulation the modulating signal is an analog signal and the carrier is a signal sinusouidale. Resuming the general expression of a sinusoidal carrier p(t) = A, sin (2nf , t+ ¢,) Amplitude The maximum displacement of the vibrating particle of the given medium from the mean position is defined as the Amplitude of the Amplitude wave. y = A sin w t the amplitude of =angular A =D the wave, frequency, period. t time Time Condensation Rarefaction High Sound is vibration. As such, sound can pass through many different substances - in fact, it requires the presence of a medium. Sound cannot travel in a vacuum. Air Pressure Low Time Electromagnetic Radiation Electromagnetic radiation consists of an electrical field (E) which varies in magnitude in a direction perpendicular to the direction in which the radiation is traveling, & a magnetic field (M) oriented at right angles to the AMÄÄ electrical field. C-λν A=Wavelength, V=frequency & c= speed of light Optical Frequency Combs An optical "frequency comb" is a very precise tool for measuring different colors-or frequencies-of light. Time Wavelength wavelength The spectrum organizes different types of EM waves according to their wavelength. Wavelength is a measure of distance. реak peak distance trough NIMIN Envelope The envelope function of an oscillating signal is a smooth curve outlining its extremes. The envelope thus generalizes the concept of a constant amplitude. Amod