In soft tissue, sound with a frequency of 1 MHz has a wavelength of approximately ______.

In soft tissue, sound with a frequency of 1 MHz has a wavelength of approximately ______.

• A. 0.77 mm
• B. 3.08 mm
• C. 1.54 mm
• D. 0.154 mm

Answer: (C)

Wavelength in a medium comes from dividing the speed of sound by the frequency. In soft tissue, the speed is about 1540 m/s. With a frequency of 1 MHz (1,000,000 Hz), the wavelength is 1540 / 1,000,000 = 0.00154 meters, which equals 1.54 millimeters. So the wavelength is approximately 1.54 mm. For context, the other numbers would correspond to different frequencies: about 2 MHz would give roughly 0.77 mm, about 0.5 MHz would give roughly 3.08 mm, and about 10 MHz would give roughly 0.154 mm.

Wavelength in a medium comes from dividing the speed of sound by the frequency. In soft tissue, the speed is about 1540 m/s. With a frequency of 1 MHz (1,000,000 Hz), the wavelength is 1540 / 1,000,000 = 0.00154 meters, which equals 1.54 millimeters. So the wavelength is approximately 1.54 mm.

For context, the other numbers would correspond to different frequencies: about 2 MHz would give roughly 0.77 mm, about 0.5 MHz would give roughly 3.08 mm, and about 10 MHz would give roughly 0.154 mm.