abdullahAK
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Why do we use high frequencies when using ultrasound to produce images? For example, producing the image of the baby inside a mother's tummy
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Joinedup
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Have a think about what happens to wavelength when frequency is increased...

then have a think about the relationship between wavelength and the size of the smallest features you're able to image
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abdullahAK
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Joinedup I apologize for a delayed reply.
Increasing the frequency decreases the wavelength.
When wavelength decreases, it can penetrate more and help us visualize smaller things, right?
Is this the reason we can't see atoms because the wavelength of the light is bigger than the size of the atoms which means they cannot penetrate enough so that we can see the atoms.
I hope I was able to get my point across.
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Joinedup
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Yeah - if you get an exam question I'd say resolution rather than penetration* - you typically want the wavelength to be smaller than the features you're looking for.

*afaik you get more attenuation i.e. less penetration with shorter wavelength ultrasound https://radiopaedia.org/articles/attenuation-ultrasound
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