Uses of Electricity Current electricity is used to provide many conveniences in modern life. From the invention of the light bulb to the use of the integrated circuit, many changes have taken place. This chapter reviews the uses of electricity. It includes such terms as vacuum tube, transistor, and integrated circuit. In this chapter, you will become acquainted with characteristics of waves, especially light waves.
Waves are disturbances that travel through matter or space in regular patterns.
These movements also transfer energy from place to place and may be classified as mechanical or electromagnetic. Sound is an example of mechanical waves. This chapter reviews the behavior of electromagnetic waves, especially visible light. Sound Sound waves are mechanical waves. They are also called compressional waves because of the way they move through matter.