# NCERT Solutions For Class 12 Physics Chapter 8 Electromagnetic Waves

NCERT solutions for class 12 Physics chapter 8 Electromagnetic Waves: Maxwell introduced the term displacement current to remove inconsistency in Ampers law.the chapter NCERT solutions for class 12 Physics chapter 8 Electromagnetic Waves starts with the concept of displacement current. Then talks about Maxwell’s equations and electromagnetic wave their properties and applications. NCERT solution for class 12 Physics chapter 8 Electromagnetic Waves also talks about the electromagnetic spectrum. Different electromagnetic waves and their wavelength are listed below.

 Electromagnetic wave type Wavelength range Radio wave Greater than 0.1 m Microwave 0.1m to 1 mm Infra-red wave 1mm to 700 nm Light 700 nm to 400 nm Ultraviolet 400 nm to 1nm X-rays 1nm to 0.001nm Gamma rays Less than 0.001nm

A sample question from NCERT solutions for class 12 Physics chapter 8 Electromagnetic Waves is given below

8.13) Use the formula $\lambda _m T = 0.29 cm K$ to obtain the characteristic temperature ranges for different parts of the electromagnetic spectrum. What do the numbers that you obtain tell you?

This can be solved using the above table.

## The topics of NCERT class 12 Physics chapter 8 Electromagnetic Waves are

8.1 Introduction

8.2 Displacement Current

8.3 Electromagnetic Waves

8.3.1 Sources of electromagnetic waves

8.3.2 Nature of electromagnetic waves

8.4 Electromagnetic Spectrum

8.4.2 Microwaves

8.4.3 Infrared waves

8.4.4 Visible rays

8.4.5 Ultraviolet rays

8.4.6 X-rays

8.4.7 Gamma rays

Study the application of EM wave and how EM waves are produced and detected. This will help you in your board exam. Also, the concept of displacement current and Maxwell's equations are important from NCERT grade 12 chapter 8. Another important topic is the equation of electromagnetic wave and relation between the magnetic field, electric field, and speed of light.

## Try to solve all the questions of this chapter. The NCERT solutions for class 12 Physics chapter 8 Electromagnetic Waves is given below:

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## NCERT Solutions for Class 12 Physics- Chapter wise

 Chapter 1 Electric Charges and Fields Chapter 2 Electrostatic Potential and Capacitance Chapter 3 Current Electricity Chapter 4 Moving charges and magnetism Chapter 5 Magnetism and Matter Chapter 6 Electromagnetic Induction Chapter 7 Alternating Current Chapter 9 Ray Optics and Optical Instruments Chapter 10 Wave Optics Chapter 11 Dual nature of radiation and matter Chapter 12 Atoms Chapter 13 Nuclei Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits