A dolphin emits an ultrasonic pulse of frequency 120kHz under seawater while hunting for fish.
(a) If the speed of sound in seawater is 1530m/s, calculate the wavelength of this ultrasound in seawater.
(b) The pulse is reflected back from a school of fish and returns to the dolphin in 0.40s. Determine the distance of the fish from the dolphin.
(c) Ultrasound scanners used by veterinarians pass the same 120kHz sound through bone where the speed of sound is about 3500m/s. Calculate the wavelength of this ultrasound in bone.
(d) Briefly discuss how the change in wavelength between seawater and bone could affect the resolution of images formed by ultrasound equipment.