Final answer:
The transducer that lacks range resolution is the continuous wave (CW) transducer, as it does not pulse and cannot distinguish between depths. Electromagnetic waves are classified as transverse waves.
Step-by-step explanation:
The type of transducer that lacks range resolution is the continuous wave (CW) transducer. Continuous wave transducers continuously transmit and receive ultrasonic waves without pulsing, which means they cannot distinguish between echoes coming from different depths. As a result, they do not have range resolution, making it impossible to determine the exact location of objects or interfaces within the body.
Electromagnetic waves are considered transverse waves because the oscillations in the electric and magnetic fields are perpendicular to the direction in which the wave is moving. This question was to determine your knowledge on the nature of electromagnetic waves among the given options.