2. P9 Electromagnetic Spectrum
1. Describe the main features of the
2. State the approximate value of the speed of all
electromagnetic waves in vacuo.
3. P9 Electromagnetic Spectrum
3. Describe the role of electromagnetic waves in:
• radio & television communications (radio waves)
• satellite television and telephones (microwaves)
• electrical appliances, remote controllers for
televisions and intruder alarms (infrared)
• medicine and security (X-rays).
4. Demonstrate understanding of safety issues
regarding the use of microwaves and X-rays.