6.2 Interference of Sound

What is interference in the context of waves?

• When two waves change direction

• When two waves meet and affect each other

• When two waves stop moving

• When two waves reflect off a surface

Which type of waves can interfere with each other?

• Different types of waves

• Only the same type of waves

• Light waves and sound waves together

• Water waves and sound waves together

Which of the following is an example of interference?

• Water waves meeting sound waves

• Two sound waves meeting each other

• A sound wave hitting a wall

• A light wave passing through a prism

What conditions make interference easiest to detect?

• Waves with different frequencies

• Waves with the same frequency and amplitude

• Waves of different types

• Waves traveling in opposite directions

What happens when waves reinforce?

• Their amplitudes are added together

• Their amplitudes cancel out

• Their frequencies increase

• They change direction

What does reinforcement of sound waves cause?

• A quieter sound

• A louder sound

• A change in pitch

• The sound to disappear

What remains unchanged when waves reinforce?

• Frequency of the waves

• Amplitude of the waves

• Loudness of the sound

• Type of wave

Where do sound waves reinforce in a music concert?

• Where peaks of sound waves meet

• Where troughs of sound waves meet

• Both a and b

• Nowhere; sound waves don’t reinforce

What does reinforcement produce on an oscilloscope?

• Waves with larger amplitude

• Waves with smaller amplitude

• Straight lines

• No pattern

What is the role of loudspeakers in creating reinforcement at concerts?

• To create higher frequencies

• To create sound waves that reinforce at specific points

• To reduce sound volume

• To cancel sound completely