Waves associated with electricity and magnetism and as they are waves so they willpropagate in the space. Learn Videos. 7 mins. If there are number of waves, they travel independently and characteristics of the wave remain unchanged. 8 mins. It helps us to categorize various waves based on their frequency, wavelength, uses, and origin. myCBSEguide App. 14. Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only), Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses Study Materials Development Leading to Bohr's Model of Atom: Electromagnetic Radiation. Propagation of Electromagnetic Waves. What is the principle of production of E.M. waves? The broad spectrum of electromagnetic waves, stretching from γ rays (wavelength ~10–12 m) to long radio waves (wavelength ~10 6 m) is described. EM waves are used for communication purposes, voice communication in mobile phones, telecommunication used in radio. • The radiations are called electromagnetic radiations or electromagnetic waves. Please enable Cookies and reload the page. It appears reasonable, say from our discussion of the displacement current. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. 4. The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.. Class 12 Physics (India) Unit: Electromagnetic waves. Overview. We will start with Maxwell's equations and gradually move on to discuss the properties of Electromagnetic Waves such as their contents, source, propagation, momentum, and energy. present a descriptive account of electromagnetic waves. Write any five electromagnetic waves in the order of decreasing frequency and write any two properties and uses of each 5. Describe Hertz experiment to demonstrate the production of electromagnetic waves 3. Electromagnetic waves do not need a material medium for their; propagation. 6. Wave nature of electromagnetic radiation is characterized by its following three properties – Wavelength Frequency Velocity Wavelength – The distance of one full cycle of the oscillation is called wavelength or the distance between two adjacent crests or troughs of a wave is called the wavelength. Deduce an expression for velocity of em waves in vacuum. Dronstudy provides free comprehensive chapterwise class 12 physics notes with proper images & diagram. CBSE Class 12 Physics Unit–5 Syllabus: Electromagnetic waves. 4.6. For the videos and notes on more topics, click on Physics notes for Class 12. How the electromagnetic waves are sent and received for communication is discussed in Chapter 15. On what factors does the velocity of light in vacuum depend? English. Electromagnetic (EM) waves are the waves which are coupled time varying electric and magnetic fields that propagate in space. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 8 Electromagnetic Waves. Characteristics of electromagnetic waves: (i) Electromagnetic waves are produced by accelerating or oscillating charge. It will not take much space at all. b. Current Electricity. NCERT Solutions, NCERT Exemplars, Revison Notes, Free Videos, CBSE Papers, MCQ Tests & more. The range varies from 10 -12 m, to 10 4 m, i.e. Characteristics of EM Waves ,Electromagnetic Waves - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 12-science on TopperLearning. Login. An electromagnetic wave consists of oscillating electric and magnetic fields. Solutions as well as Practice Questions with Answers to know about different laws equations. 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