Research vessels at sea can create images of their...

Name: Problem 28, Chapter 15: College Physics: A Strategic Approach
Uploaded: 2020-11-06T07:35:27-08:00
Duration: 1 min 52 s
Channel: Sheh Lit Chang
Description: Research vessels at sea can create images of their surroundings by sending out sound waves and measuring the time until they detect echoes. This image of a shipwreck on the ocean bottom was made from the surface with 600 kHz ultrasound. a. What was the wavelength? b. How deep is the shipwreck if echoes were detected 0.42 s after the sound waves were emitted?

Research vessels at sea can create images of their surroundings by sending out sound waves and measuring the time until they detect echoes. This image of a shipwreck on the ocean bottom was made from the surface with 600 kHz ultrasound. a. What was the wavelength? b. How deep is the shipwreck if echoes were detected 0.42 s after the sound waves were emitted?

Research vessels at sea can create images of their surroundings by sending out sound waves and measuring the time until they detect echoes. This image of a shipwreck on the ocean bottom was made from the surface with 600 kHz ultrasound.
a. What was the wavelength?
b. How deep is the shipwreck if echoes were detected 0.42 s
after the sound waves were emitted?

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Key Concepts

Sound Wave Propagation

This concept involves the behavior and transmission of sound waves through a medium, such as water. Factors like the medium’s density and temperature influence the speed at which sound travels. Understanding sound propagation is crucial for applications like sonar, where reliable measurements depend on knowing the speed of sound in the medium.

Frequency-Wavelength Relationship

The relationship between a sound wave's frequency and its wavelength is defined by the equation: wavelength = speed of sound / frequency. This fundamental principle allows one to calculate the spatial extent of a wave cycle when its frequency is known, and is key in designing and interpreting acoustic imaging systems.

Time-of-Flight Measurement

Time-of-flight measurement is a technique used to determine distance by emitting a signal and measuring the time it takes for the echo to return. Since the echo has to travel to the object and back, knowing the speed of sound in the medium allows for the calculation of the distance to the object. This principle underpins sonar and echo sounding technologies.

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