A wireless local area network (Wi-Fi) uses high-frequency radio waves of frequency 2.4×109 Hz2.4 \times 10^9\text{ Hz}2.4×109 Hz to transmit and receive data between devices.
The speed of these waves in air is 3.0×108 m/s3.0 \times 10^8\text{ m/s}3.0×108 m/s.
Calculate the wavelength of these radio waves in air.
State two reasons why waves in this frequency range are used for Wi-Fi systems.
Wireless networks use digital signals to communicate.
Describe, with the aid of a diagram, how a digital signal differs from an analogue signal.
State two advantages of using digital signals rather than analogue signals.
198 exam-style questions on CIE IGCSE Physics Electromagnetic spectrum, covering Electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.