Waves

Task 1 Types of wave Waves are ways of transmitting, or carrying, energy from one place to another. 1       Explain the difference between transverse and longitudinal waves, giving examples of each 2       Explain the following terms in connection with waves, and show how they are related to each other.        a   wavelength                  b   frequency               c    velocity 3       Describe what the electromagnetic spectrum is, and describe each part of the spectrum, including what it is used for, its properties and how wavelength, frequency and velocity vary between each part. If you complete this task correctly, you will meet criterion P3.

Task 2 Communicating with waves Communication between humans, and between other animals, depends on sight and sound. 1       Explain how electromagnetic waves are used to communicate over longer distances. Your answer should cover: §  telephones, radio and television §  transmission by wires, cables, optical fibres and through air and space 2       For part of your presentation, use technology to transmit sound and visual information. The information which is sent must explain how waves are being used to carry that information from its source to its audience. If you complete this task correctly, you will meet criterion P5.

Task 3 Wireless communication Much technology today uses wireless communication.  Choose at 3 different applications of this and for each one, explain in full how wireless technology is used, how the information is carried and how it is better than wired communication. If you complete this task correctly, you will meet criterion M5.

Task 4 Comparing wired and wireless Draw up a table to show the advantages and disadvantages of wireless and wired communication.  For each one, show clearly which types of EM waves are involved in the transmission of information. If you complete this task correctly, you will meet criterion D5.