Physics
What happens when a lighted candle is placed in front of a loudspeaker making a loud and steady noise. Give reason.
Sound
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Answer
When a lighted candle is placed in front of a loudspeaker producing a loud and steady noise, the flame of the candle flickers.
A loudspeaker produces sound waves, which are longitudinal pressure waves in the air. These waves consist of alternating regions of compression and rarefaction that move outward from the speaker, causing the air near the loudspeaker to vibrate rapidly back and forth. The resulting air currents disturb the flame, making it flicker in step with the pressure variations of the sound waves.
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