Final answer:
The transducer that allows for multi-focusing while being mechanically steered is the annular phased array. This device can focus and steer the energy of individual concentric rings to achieve multi-focusing. In the context of sound and hearing, the cochlea is the component that transduces mechanical waves into electrical signals. The correct option is a. Annular phased array
Step-by-step explanation:
The type of transducer that enables multi-focusing while being steered mechanically is a. Annular phased array. This type of transducer is composed of multiple concentric rings (annuli), each of which can be individually focused and steered, allowing for multi-focusing capabilities.
In contrast, Mechanical transducers are steered and focused mechanically, but they typically do not support multi-focusing. Linear sequential arrays and convex sequential arrays use electronic steering and focusing, not mechanical.
To address the other questions for clarification purposes, electromagnetic waves are b. Transverse waves, which means that the oscillations of the electromagnetic field are perpendicular to the direction of wave propagation.
The organ that contains receptors for transduction of mechanical waves to produce electrical signals in the human body is b. cochlea, which is part of the inner ear and is responsible for converting sound waves into nerve impulses that the brain can interpret as sound.
The correct option is a. Annular phased array