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waves - Coggle Diagram
waves
types of waves
mechanical wave
A mechanical wave is a type of wave that transmits energy through a medium, such as solids, liquids, or gases, by causing the particles within the medium to oscillate around a central point.
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longitudinal wave
A longitudinal wave is a wave in which the disturbance is in the same direction as the wave's motion.
sound waves
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The higher the frequency of the sound wave, the higher the sound heard by the human ear and the higher the pitch; the lower the frequency of the sound wave, the lower the sound heard by the human ear and the lower the pitch.
light waves
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The reason why light appears white is because white is a fusion of other colours, so white cannot be considered a pure color.
ultrasound & infrasound
ultrasound
Ultrasound waves are sound waves with frequencies above 20,000 Hz. These waves are beyond the range of human hearing and therefore cannot be heard. Ultrasound waves are used in medical imaging, such as ultrasound scans, cleaning delicate objects, and sonar.
infrasound
Infrasound refers to sound waves with frequencies below 20 hertz. These waves are below the frequency of human hearing and therefore inaudible. These waves are produced by earthquakes, volcanoes, and ocean waves, and some animals, such as elephants and whales, use them to communicate over long distances.
how do we hear sound
Sound waves enter the ear canal through the pinna. They strike the eardrum, causing it to vibrate. The ossicles (bone bones) amplify these vibrations and transmit them to the inner ear. The cochlea in the inner ear converts these vibrations into electrical signals. The auditory nerve transmits these signals to the brain. The brain interprets these signals, and we perceive sound.
how do we see light
First, light is emitted from a light source. This light is reflected or transmitted into the eyeball, where it is focused onto the retina through the cornea and lens. The retina converts the light signal into an electrical signal, which is then transmitted via the optic nerve to the visual cortex in the brain for interpretation, ultimately forming the image we see.
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