Question

sound waves generated in a classroom must _______ through an open doorway in order to propagate into the hallway. reflect refract diffract

Answer 1

Answer;

Diffract

Sound waves generated in a classroom must diffract through an open doorway in order to propagate into the hallway.

Explanation;

• Sound waves are a type of mechanical waves that requires a material medium for transmission, they are longitudinal wave with all the properties of other waves.
• Diffraction is one of the property of waves that involves a change in direction of waves as they pass through an opening or around a barrier in their path. Sound wave diffract around corners or through the door openings, allowing people to hear others speaking to us from rooms that are adjacent.

Answer 2

Sound waves generated in a classroom must diffract  through an open doorway in order to propagate into the hallway.