If soft tissue velocity is 1540 meters per second and frequency is 4 MHz, what is the wavelength in millimeters?

If soft tissue velocity is 1540 meters per second and frequency is 4 MHz, what is the wavelength in millimeters?

• A. 0.771 mm
• B. 0.385 mm
• C. 3.85 mm
• D. 15.4 mm

Answer: (B)

Wavelength is the distance the wave travels in one cycle, found by dividing the propagation speed by the frequency: λ = c / f. With soft tissue speed 1540 m/s and frequency 4 MHz (4,000,000 Hz), λ = 1540 / 4,000,000 = 0.000385 meters, which converts to 0.385 millimeters. So the wavelength is 0.385 mm.

Wavelength is the distance the wave travels in one cycle, found by dividing the propagation speed by the frequency: λ = c / f. With soft tissue speed 1540 m/s and frequency 4 MHz (4,000,000 Hz), λ = 1540 / 4,000,000 = 0.000385 meters, which converts to 0.385 millimeters. So the wavelength is 0.385 mm.