Ultrasound vs Normal Waves for Sea Depth Measurement: Why Ultrasound is Superior

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Ultrasound is superior to normal waves for sea depth measurement due to its smaller wavelength, which allows for less diffraction and more focused energy on the seabed. This concentration enhances accuracy in depth readings. Additionally, ultrasound waves maintain their amplitude better than ordinary waves, leading to more reliable results. While ordinary waves have limited range and rapidly decreasing amplitude, ultrasound can travel further in water, making it more effective for depth measurement. Overall, the properties of ultrasound make it a preferred choice for accurate sea depth assessment.
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Homework Statement


Waves with small wavelengths diffract less than those with longer wavelengths. Use this information to suggest why ultrasound is much better than ordinary waves for finding the depth of the sea [3 marks]

Homework Equations


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The Attempt at a Solution


Ultrasound has a smaller wavelength than normal waves - hence wave is more concentrated on sea bed.

4. Problems

The mark scheme includes the following two, extra, factors
- amplitude decreases rapidly
- range limited / cannot travel far.

I presume that the last to factors refer to ordinary wavesIs this next sentences correct:
"the amplitude (energy) of an ultrasound wave decreases less rapidly than that of a normal wave - hence results will be more accurate and more responsive. Furthermore, ultrasound can travel further in water than normal waves"
 
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