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Physics - Coggle Diagram
Physics
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Electromagnetic waves
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Communications
Satellites
Microwaves and radio waves are used to communicate with satellites. Microwaves pass straight through the atmosphere and are suitable for communicating with distant geostationary satellites, while radio waves are suitable for communicating with satellites in low orbit.
TV and radio
Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios. These devices receive radio waves and convert them to mechanical vibrations in the speaker to create sound waves.
Fibre optic
Fiber optic data transmission systems send information over fiber by turning electronic signals into light. ... The electromagnetic spectrum is composed of visible and near-infrared light like that transmitted by fiber, and all other wavelengths used to transmit signals such as AM and FM radio and television.
Waves:Longitudinal - In longitudinal waves, the vibrations are parallel to the direction of wave travelExamples of longitudinal waves:
- Sound waves
- Ultrasound waves
Transverse - Oscillations are perpendicular (90 degrees) to the direction of wave travel.Example of Transverse Waves:
- Electromagnetic waves
- Light waves
- A Mexican wave in a sports stadium
Keywords:
- Equilibrium: Is defined as a state of balance or a stable situation where opposing forces cancal each other out and where no change occurs.
- Amplitude: The height of a wave crest or trough of a transverse wave from the rest position.
- Frequency(Hz): The number of wave crests passing a fixed point every second.
- Wave length(m): The number of wave crests passing a fixed point every second.
- Time Period: The time in seconds for one complete wave.
- Wave Speed(m/s): Distance trabelled per second
Refraction:
Refraction is the change in direction of a wave passing from one medium to another, or from a gradual change in medium. The wave length will start to decrease when passing through a denser medium.
For example, waves in deep water travel faster than in shallow because of the force exerted on them by the seabed.