Substrand: "9.9 Communication technology" (10 periods)

This sub-strands deals with Electromagnetic spectrum which consists of a variety of electromagnetic waves. Light is one of the electromagnetic waves. Visible light enables us to see things with our eyes. The rest of the waves are invisible. X-rays, radio waves, and ultraviolet rays are some examples. Invisible rays can only be detected by machines such as mobile phones, radios, fax and many other modern types of equipment. Today’s technology effectively uses electromagnetic waves, hence, making communication possible.

Learner's should:

Learner's should:

Learner's should:

9.9.1 know the types of waves (k)

9.9.1.1 describe the two types of waves: Transverse and Longitudinal

9.9.2 understand that waves have different properties (u)

9.9.2.1 explain the properties of waves with the aid of a diagram; frequency, wavelength and amplitude

9.9.3 know that elect tromagnetic spectrum contains variety of waves with different wavelengths and frequencies (k)

9.9.3.1 identify the different wavelengths and frequencies from the electromagnetic spectrum (i.e, from smallest to largest wavelength) Gamma ray, X-ray, ultra violet rays, visible light, infra-red, micro-wave, radio wave

9.9.4 be able to show the use of electromagnetic waves in things we use in our daily lives (s)

9.9.4.1 display the electronic equipment that use the following waves: Gamma ray, X-ray, Ultra violet rays, Visible light, Infra-red, Micro-wave, Radio wave

9.9.5 appreciate today’s communication efficiency (a)

9.9.5.1 express analogue and digital signals and its uses