Chapter 11, Problem 19STP

To determine

To describe: The reason of all objects emitting electromagnetic radiation.

Explanation of Solution

Introduction:

Almost all objects on earth emit electromagnetic radiation according to the body temperature. Object with low temperature emits waves such as radio or microwaves, while objects with high temperature emit ultraviolet or visible light waves.

Objects are composed of various smaller charged particles which are in constant motion, either increasing or decreasing motion. If the particles are in accelerating motion then the object absorbs energy in the form of electromagnetic waves and if decelerating motion then it emits or radiates electromagnetic waves. This phenomenon is commonly known as black body radiation.

Conclusion:

Hence, the reason of objects emitting electromagnetic radiation are the charged particles in motion.