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| hambasics:sections:wavemodulation [2022/11/04 18:52] – created - external edit 127.0.0.1 | hambasics:sections:wavemodulation [2024/11/24 12:43] (current) – va7fi |
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| Here are two moving waves (press the play {{/play.png}} button on the bottom left corner of the picture). What's different about them? What's the same? | Here are two moving waves (press the play {{/play.png}} button on the bottom left corner of the picture). What's different about them? What's the same? |
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| {{ggb>/howto/hambasics/sections/travelingwave.ggb 800,250}} | {{ggb>/hambasics/sections/travelingwave.ggb 800,250}} |
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| To quantify these observations more precisely, let's look at a snapshot of both waves frozen in time. | To quantify these observations more precisely, let's look at a snapshot of both waves frozen in time. |
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| {{ howto:hambasics:sections:travelingwaves.png }} | {{ hambasics:sections:travelingwaves.png }} |
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| * the //amplitude// is the vertical height from the centre of the wave to its highest (or lowest) point. <fc #0014a8>The blue wave has an amplitude of 2</fc> and the <fc #008000>green wave has an amplitude of 1</fc>. | * the //amplitude// is the vertical height from the centre of the wave to its highest (or lowest) point. <fc #0014a8>The blue wave has an amplitude of 2</fc> and the <fc #008000>green wave has an amplitude of 1</fc>. |
| When two waves overlap, they add up together at every point. Here, the <fc #4682b4>blue</fc> and <fc #008000>green</fc> waves are generated and add up together to form the <fc #ff0000>red</fc> wave. You can move the blue and green waves and see the result. To convince yourself that the red wave is really the sum of the blue and green waves, look at points <fc #4682b4>A</fc>, <fc #008000>B</fc>, and <fc #ff0000>C</fc>. You can move the blue or green waves by sliding their phase (<fc #4682b4>φ</fc> and <fc #008000>Φ</fc>) around. You'll see that point <fc #ff0000>C</fc> is always the sum of <fc #4682b4>A</fc> and <fc #008000>B</fc>. | When two waves overlap, they add up together at every point. Here, the <fc #4682b4>blue</fc> and <fc #008000>green</fc> waves are generated and add up together to form the <fc #ff0000>red</fc> wave. You can move the blue and green waves and see the result. To convince yourself that the red wave is really the sum of the blue and green waves, look at points <fc #4682b4>A</fc>, <fc #008000>B</fc>, and <fc #ff0000>C</fc>. You can move the blue or green waves by sliding their phase (<fc #4682b4>φ</fc> and <fc #008000>Φ</fc>) around. You'll see that point <fc #ff0000>C</fc> is always the sum of <fc #4682b4>A</fc> and <fc #008000>B</fc>. |
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| {{ggb>/howto/hambasics/sections/waveaddition.ggb 800,500}} | {{ggb>/hambasics/sections/waveaddition.ggb 800,500}} |
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