What is the wavelength of 1 MHz sound in soft tissue?

To determine the wavelength of 1 MHz sound in soft tissue, it's essential to understand the relationship between frequency, speed of sound, and wavelength. The formula that connects these three parameters is:

[ \text{Wavelength} = \frac{\text{Speed of sound}}{\text{Frequency}} ]

In soft tissue, the speed of sound is approximately 1540 meters per second (m/s). Given that the frequency is 1 MHz, which is equivalent to 1,000,000 Hz, we can substitute these values into the formula:

[ \text{Wavelength} = \frac{1540 , \text{m/s}}{1,000,000 , \text{Hz}} ] [ \text{Wavelength} = 0.00154 , \text{m} = 1.54 , \text{mm} ]

Thus, the wavelength of 1 MHz sound in soft tissue is indeed 1.54 mm. This value is significant in the context of diagnostic sonography, as it helps in understanding how ultrasound waves interact with different tissues, affecting image resolution and penetration depth. The correct answer highlights the fundamental concept used in ultrasound physics, linking frequency with wavelength