No, a radio wave is not a mechanical wave; it is a type of electromagnetic wave.
Mechanical waves require a medium (such as air, water, or solid materials) to travel through. This means they can only propagate through these substances and cannot travel in a vacuum. Examples of mechanical waves include sound waves and water waves.
In contrast, radio waves are part of the electromagnetic spectrum and can travel through a vacuum as well as through various media. They are generated by the movement of electric charges and can travel at the speed of light. This characteristic allows radio waves to be used for communication technologies, such as radio, television, and wireless internet.
In summary, the key difference lies in the requirement of a medium for propagation: mechanical waves need one, while electromagnetic waves, including radio waves, do not.