Question

Absorption and dispersion of Ultrasonic wave causes:

Answer 1

Thermosonic effect

Answer 2

Absorption of ultrasonic waves converts acoustic energy into thermal energy, causing the medium to heat up. This phenomenon is known as the thermosonic effect or acoustic heating. Dispersion, on the other hand, causes different frequency components of the wave to travel at different speeds, leading to waveform distortion, but not directly to heating. Since the question asks what "absorption and dispersion" cause, and typical options for such a question often include heating-related terms, the thermosonic effect is the most prominent energy-related consequence arising from the interaction, primarily due to absorption.