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Waves and the Electromagnetic Spectrum
Introduction
Waves are used to transfer energy and information. The electromagnetic spectrum includes a wide range of waves, each with unique properties and uses.
This article will cover:
- Properties of waves.
- The electromagnetic spectrum and its uses.
- Practical applications in communication and medicine.
Properties of Waves
Key Terms
- Wavelength (\( \lambda \)): Distance between peaks.
- Frequency (\( f \)): Number of waves per second.
- Amplitude: Height of a wave, linked to energy.
Wave Equation
\[
v = f \lambda \quad (\text{Wave speed} = \text{Frequency} \times \text{Wavelength}).
\]
The Electromagnetic Spectrum
Wave Types
- Radio Waves: Communication.
- Microwaves: Cooking, mobile phones.
- Infrared: Thermal imaging.
- Visible Light: Human vision.
- X-rays: Medical imaging.
Practical Applications
- Communication: Mobile phones, Wi-Fi, and satellite systems.
- Medicine: X-rays for imaging, UV light for sterilisation.
Conclusion
Waves and the electromagnetic spectrum are essential for understanding modern technology and natural phenomena. Practise applying wave equations and exploring spectrum applications for GCSE Physics exams.
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