Explanation – A shock wave is a strong pressure wave that propagates through a medium (such as air, water, or solids) at a speed greater than the local speed of sound. It is characterized by an abrupt and nearly discontinuous change in the medium’s properties, such as pressure, temperature, and density. Researchers at the IIT Bombay have developed a needle-free “shock syringe”, offering a pain-free alternative for drug delivery. The shock syringe uses high-energy pressure waves (shock waves) to pierce the skin and deliver medication without needles.

Source: The Hindu