What is reflection?

What is reflection?

• A. Sound waves bouncing off surfaces.
• B. Sound waves bending around obstacles.
• C. Sound waves bending when entering a different medium.
• D. Sound waves dissipating energy.

Answer: (A)

Reflection is the bouncing back of a sound wave when it hits a surface. When a sound wave encounters a boundary, part of its energy is redirected back into the original medium, which is why you hear an echo in a room or canyon. For smooth surfaces, the angle at which the wave hits the surface tends to equal the angle at which it reflects, following a simple rule that helps predict where the sound will go. This description fits best because it captures the wave’s change in direction without transferring into a new medium. Diffraction describes bending around obstacles, refraction describes bending as waves enter a different medium, and dissipation refers to the loss of energy as the wave travels.

Reflection is the bouncing back of a sound wave when it hits a surface. When a sound wave encounters a boundary, part of its energy is redirected back into the original medium, which is why you hear an echo in a room or canyon. For smooth surfaces, the angle at which the wave hits the surface tends to equal the angle at which it reflects, following a simple rule that helps predict where the sound will go. This description fits best because it captures the wave’s change in direction without transferring into a new medium. Diffraction describes bending around obstacles, refraction describes bending as waves enter a different medium, and dissipation refers to the loss of energy as the wave travels.