3.3.7—EM radiation: (a) mobile
- Syllabus
- 0625–2026–2027
- Objective
- 3.3.7
- Level
- —
3.3.7—EM radiation: (a) mobile
- Know communication systems using EM radiation: (a) mobile phones/wireless internet use microwaves because they penetrate some walls and need short aerials (b) Bluetooth uses radio waves because they pass through walls but weaken (c) optical fibres use visible/infrared for cable TV and high-speed broadband because glass transmits them and they carry high data rates
ConceptIGCSE Physics