A 2 MHz frequency yields a wavelength of approximately ______ mm in soft tissue.

A 2 MHz frequency yields a wavelength of approximately ______ mm in soft tissue.

• A. 1.54 mm
• B. 0.385 mm
• C. 1.23 mm
• D. 0.77 mm

Answer: (D)

In soft tissue, wavelength is found from the relationship λ = c / f, where c is the speed of sound and f is the frequency. The speed of sound in soft tissue is about 1540 m/s. For a frequency of 2 MHz (2,000,000 Hz), the wavelength is 1540 / 2,000,000 = 0.00077 meters, which converts to 0.77 millimeters. This aligns with the idea that higher frequencies produce shorter wavelengths. For quick cross-checks: a wavelength of about 1.54 mm would correspond to 1 MHz, and around 0.385 mm would correspond to roughly 4 MHz, so 0.77 mm fits 2 MHz.

In soft tissue, wavelength is found from the relationship λ = c / f, where c is the speed of sound and f is the frequency. The speed of sound in soft tissue is about 1540 m/s.

For a frequency of 2 MHz (2,000,000 Hz), the wavelength is 1540 / 2,000,000 = 0.00077 meters, which converts to 0.77 millimeters.

This aligns with the idea that higher frequencies produce shorter wavelengths. For quick cross-checks: a wavelength of about 1.54 mm would correspond to 1 MHz, and around 0.385 mm would correspond to roughly 4 MHz, so 0.77 mm fits 2 MHz.