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topic 3 waves - Coggle Diagram
topic 3 waves
Useful Types of Waves (The EM Spectrum)
Light: Used in optical fibres for telecommunication.
Ultraviolet (UV): Used for sterilisation (killing microbes) and in sunbeds.
Infrared Waves: Primarily used in remote-controlled devices.
X-rays: Used in radiological applications (imaging internal organs/bones) and engineering (checking structures for damage).
Microwaves: Used in microwave ovens to heat food and for satellite communication.
Gamma Rays: Used in medical treatments, such as for brain cancer.
Radio Waves: Used for radio and television communications.
Describing Waves (Key Terms)
Crests & Troughs: Crests are the highest points of a wave, while troughs are the lowest points.
Rest Position: This is the position of the medium when it is undisturbed.
Wavelength ($\lambda$): The distance between two successive crests or troughs.
Amplitude: The distance from the rest position to either the crest or the trough.
Frequency: The number of complete wave cycles produced per second.
Unit: Measured in Hertz (Hz).
Branch 1: What Are Waves?
Generation: Waves are generated by vibrations (motion that repeats itself).
Energy Transfer: Waves transfer energy from one end to another.
Medium: They transfer energy without transferring any part of the medium (like a rope or spring) they pass through.
Examples: Waves can be illustrated using wave motion in ropes and springs.
