Understanding Sound Wave Diffraction

Why can the street cleaner hear the radio even though there is a building in between?

• The radio signal is very strong.

• The sound waves are diffracted around the building.

• The building amplifies the sound.

• The sound waves travel in a straight line.

What happens to sound waves when they pass through an obstacle?

• They spread out to a wider area.

• They get absorbed by the obstacle.

• They travel faster.

• They stop completely.

What is the relationship between wavelength and diffraction?

• Only light waves are affected by wavelength.

• Wavelength does not affect diffraction.

• Longer wavelengths diffract more.

• Shorter wavelengths diffract more.

Why is the sound heard by the street cleaner softer after diffraction?

• The frequency of the sound waves increases.

• The sound waves lose energy.

• The sound waves are absorbed by the air.

• The amplitude of the sound waves decreases.

In an exam, why might you be asked about the amplitude of sound after diffraction?

• To understand why sound is softer.

• To discuss the speed of sound.

• To describe the frequency of sound.

• To explain why sound is louder.