NCERT Grade 12 Physics Chapter 8, Electromagnetic Waves is from Unit 5, Electromagnetic Waves. This is the last chapter from Part 1 Physics of Grade 12 NCERT. In this chapter, students first discuss the need for displacement current and its consequences. Then they learn to present a descriptive account of electromagnetic waves. The broad spectrum of electromagnetic waves, stretching from γ rays (wavelength~10–12 m) to long radio waves (wavelength~106 m) is described in this chapter.
The chapter begins with Introduction to Electromagnetic Waves and further proceeds to explain topics such as Displacement Current, Sources of electromagnetic waves, Nature of electromagnetic waves, Electromagnetic Spectrum, Radio waves, Microwaves, Infrared waves, Visible rays, Ultraviolet rays, X-rays and Gamma rays. Students will learn about the source, creation, deviation and applications of different types of Electromagnetic Waves. Similarly, diagrams, graphs, illustrations, energy diagrams and examples associated to daily life make this chapter very interesting and easy to learn. Solved numeral problems and unsolved ones for practice make the students understand the concept better and develop a strong grip on the subject.
The contribution of eminent scientists such as Maxwell, Hertz and others towards electromagnetic waves has helped to develop laws on the topic that the students shall study through this chapter. Detailed derivations to help derive formulas and equations will aid to solve the problems and understand the concepts. NCERT Grade 12 Physics Chapter 8, Electromagnetic Waves is from Unit 5, Electromagnetic Waves. Unit 5 holds a total weightage of 3 marks in the final examination according to the latest pattern.
Get 100 percent accurate NCERT Solutions for Class 12 Physics Chapter 8 (Electromagnetic Waves) solved by expert Physics teachers. We provide solutions for questions given in Class 12 Physics text-book as per CBSE Board guidelines from the latest NCERT book for Class 12 Physics. The topics and sub-topics in Chapter 8 Electromagnetic Waves are given below.
Ex 8.1 - INTRODUCTION
Ex 8.2 - DISPLACEMENT CURRENT
Ex 8.3 - ELECTROMAGNETIC WAVES
Ex 8.3.1 - Sources of electromagnetic waves
Ex 8.3.2 - Nature of electromagnetic waves
Ex 8.4 - ELECTROMAGNETIC SPECTRUM
Ex 8.4.1 - Radio waves
Ex 8.4.2 - Microwaves
Ex 8.4.3 - Infrared waves
Ex 8.4.4 - Visible rays
Ex 8.4.5 - Ultraviolet rays
Ex 8.4.6 - X-rays
Ex 8.4.7 - Gamma rays.
We cover all exercises in the chapter given below:-
Chapter 8 Exercises - 15 Questions with solutions.
Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Electromagnetic Waves. Download the free PDF of Chapter 8 Electromagnetic Waves and take the print out to keep it handy for your exam preparation.