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Stationary waves AS level
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My textbook says that is you create a stationary wave with microwaves, there is no signal at the nodes. Why is this?
My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
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(Original post by user342)
My textbook says that is you create a stationary wave with microwaves, there is no signal at the nodes. Why is this?
My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
My textbook says that is you create a stationary wave with microwaves, there is no signal at the nodes. Why is this?
My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
There's a bit of complexity with standing sound waves in pipes... you get a node at the closed end and an anti node at the open end - I wonder if that's what's confused you.
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(Original post by user342)
My textbook says that is you create a stationary wave with microwaves, there is no signal at the nodes. Why is this?
My textbook says that is you create a stationary wave with microwaves, there is no signal at the nodes. Why is this?
(Original post by user342)
...My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
...My notes also say that of you create a stationary wave with sound waves, the sound is louder at nodes and hardly any sound at anti nodes. I understand this is something to do with the pressure at nodes and anti nodes. But why is this different to the microwaves?
As sound is a longitudinal wave, we tend to detect the sound based on fluctuation of pressure. In a stationary sound wave, a displacement node is a pressure anti-node while a displacement antinode is a pressure node. So we tend to hear a loud sound at the pressure anti-node which is a displacement node.
However, microwave is an electromagnetic wave and a transverse wave. In a stationary microwave, there is only "displacement" node and anti-node based on the strength of the electric field.
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