Lecture #01 Electromagnetic Waves (Modern Physics) скачать в хорошем качестве

Lecture #01 Electromagnetic Waves (Modern Physics)

‪@PhysicsMaterialsScienceandNano‬ What Are Electromagnetic Waves? Electromagnetic waves are also known as EM waves. Electromagnetic radiations are composed of electromagnetic waves that are produced when an electric field comes in contact with the magnetic field. It can also be said that electromagnetic waves are the composition of oscillating electric and magnetic fields. Electromagnetic waves are solutions of Maxwell’s equations, which are the fundamental equations of electrodynamics. How Are Electromagnetic Waves Formed? Generally, an electric field is produced by a charged particle. A force is exerted by this electric field on other charged particles. Positive charges accelerate in the direction of the field and negative charges accelerate in a direction opposite to the direction of the field. The Magnetic field is produced by a moving charged particle. A force is exerted by this magnetic field on other moving particles. The force on these charges is always perpendicular to the direction of their velocity and therefore only changes the direction of the velocity, not the speed. So, the electromagnetic field is produced by an accelerating charged particle. Electromagnetic waves are nothing but electric and magnetic fields travelling through free space with the speed of light c. An accelerating charged particle is when the charged particle oscillates about an equilibrium position. If the frequency of oscillation of the charged particle is f, then it produces an electromagnetic wave with frequency f. The wavelength λ of this wave is given by λ = c/f. Electromagnetic waves transfer energy through space. Applications of Electromagnetic Waves Following are a few applications of electromagnetic waves: Electromagnetic radiations can transmit energy in a vacuum or using no medium at all. Electromagnetic waves play an important role in communication technology. Electromagnetic waves are used in RADARS. UV rays are used to detect forged bank notes. Real banknotes don’t turn fluorescent under UV light. Infrared radiation is used for night vision and is used in security cameras. In this educational video, we dive into the fascinating world of electromagnetic waves. Join us as we explore the electromagnetic spectrum, discuss different types of electromagnetic waves, and delve into the properties and characteristics of these waves. Whether you're a physics enthusiast or simply curious about the science behind it all, this video will provide you with valuable knowledge and insights. Come learn and innovate with us in the world of physics. Don't miss out, click to watch and learn more! Electromagnetic Waves Modern Physics Physics tutorials Electromagnetic theory Physics in English Understanding electromagnetism Educational Science Physics concepts Electromagnetic radiation Physics online lessons Physics education Wave theory Light waves Physics study help Electromagnetic waves lesson Modern physics explained Physics shorts Science shorts Electromagnetic spectrum Physics for students Electromagnetic waves tutorial Electromagnetic fields Study physics Physics video Wave-particle duality Quantum Physics Learning physics Physics class Interactive physics. Electromagnetic waves electromagnetic spectrum properties of waves wave-particle duality radio waves microwaves infrared ray visible light ultraviolet rays X-rays gamma rays reflection refraction diffraction dispersion communication medical imaging technology