Understanding Wave Interference

What happens when two wave pulses meet and combine to form a larger wave?

• Destructive interference

• Constructive interference

• Wave cancellation

• Wave reflection

How do you calculate the resulting amplitude when two waves interfere constructively?

• Subtract the smaller amplitude from the larger one

• Divide the larger amplitude by the smaller one

• Add the amplitudes

• Multiply the amplitudes

What is the principle behind active noise-cancelling headphones?

• They use constructive interference to enhance sound

• They use destructive interference to cancel noise

• They amplify ambient noise

• They block sound physically

What is the path difference for constructive interference?

• Half of the wavelength

• A quarter of the wavelength

• An odd multiple of half the wavelength

• An integer multiple of the wavelength

What is the term for waves that have the same frequency and a constant phase difference?

• Convergent waves

• Divergent waves

• Coherent waves

• Incoherent waves

If two speakers are 2.1 meters and 1.8 meters away from a listener, what is the path difference?

• 3.9 meters

• 0.3 meters

• 1.2 meters

• 0.6 meters

How do you determine if a location is a maximum or minimum sound point?

• By observing the color of the sound waves

• By calculating the path difference and comparing it to the wavelength

• By checking the temperature of the air

• By measuring the sound intensity

What is the wavelength if the frequency is 850 Hz and the speed of sound is 340 m/s?

• 1.2 meters

• 0.8 meters

• 0.2 meters

• 0.4 meters

What is the result when two waves with a path difference of 0.5 wavelengths meet?

• Destructive interference

• Constructive interference

• No interference

• Amplified interference

What is the frequency that would result in destructive interference if the path difference is 2 meters and the wavelength is 0.5 meters?

• 773 Hz

• 850 Hz

• 680 Hz

• 340 Hz