Question

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how do noise canceling headphones work?
by stopping sound waves
by interfering with sound waves
by using antennas
by transmitting light waves

Explanation:

Noise - canceling headphones work based on the principle of wave interference. They don't stop sound waves (eliminating the first option). Antennas are used for receiving electromagnetic signals, not related to sound (eliminating the third option). Transmitting light waves has nothing to do with sound cancellation (eliminating the fourth option). They produce sound waves that interfere with the incoming noise waves, specifically destructive interference, to reduce the noise. So the correct option is the one about interfering with sound waves.

Answer:

B. by interfering with sound waves