CAIE IGCSE Physics Electromagnetic Communications
Practise choosing microwaves, radio waves, visible light or infrared for mobile, Bluetooth and fibre communication and justify each choice physically.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- justify microwaves for mobile signals by wall penetration and the short aerial required
- explain Bluetooth range through radio-signal weakening as it passes walls and travels farther
- choose visible or infrared for fibres because glass transmits them at high data rates
3.3.7—EM radiation: (a) mobile question 1
[Maximum number: 1]
State one advantage of using microwaves compared with radio waves to transmit mobile (cell) phone signals.
any one from:
- only require a short aerial / antenna
- can pass through the atmosphere / ionosphere to satellites
- can transmit large amounts of data at high speeds / high rate of data transmission
B1
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