36 lines
1.8 KiB
Markdown
36 lines
1.8 KiB
Markdown
# Sound
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• **Wave transfers energy not matter**
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The movement of the disturbance through a medium due to repeated periodic motion of particles about their mean positions is known as a wave.
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<table>
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<tr>
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<th>Types of Waves</th>
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</tr>
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<tr>
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<td>
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i. Mechanical Wave
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<hr>
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Mechanical Wave - *Periodic* disturbance which *requires material medium* (i.e. solid, liquid or gas) *for its propagation*.
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These waves are characterized by the motion of the particles of a medium.
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These waves have well defined characteristics.
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<hr>
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<blockquote>
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If the particles of a medium oscillate to and fro in the direction of wave propagation -> longitudinal wave
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If the particles of a medium oscillate to and fro perpendicular to the direction of wave propagation -> Transverse wave
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</blockquote> <hr>
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</td>
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<td>
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ii. Electromagnetic Wave
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<hr>
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Type of wave that can travel through the vacuum of space
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i.e they *don't require a material medium for propagation*.
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They are created by the *vibration of electric charges* and consist of *oscillating electric and magnetic fields* that are *perpendicular* to each other and to the direction of the wave's travel.
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</td>
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<td>
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iii. Matter Wave
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In quantum mechanics, particles such as electrons and photons exhibit both wave-like and particle-like properties—a concept known as wave-particle duality. Matter waves refer to the wave aspect of this duality.
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<caption>
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Matter Waves - Remark - Just as light can behave like both waves and individual particles, matter (ex. electrons) can also exhibit wave like behaviour under certain coditions.
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Physicist Louis de Broglie introduced the idea in 1924 that particles have their associated wavelengths.
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</caption>
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</td>
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</table> |