Q2. a) Explain what is meant by diffraction of waves, and give two examples of when diffraction...

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Physics

Q2.

a) Explain what is meant by diffraction of waves, and give twoexamples of when diffraction is useful.

b) A loudspeaker has a diameter of 0.15 m. Using the principle ofcircular hole diffraction, calculate the angle at which the firstminimum occurs when a. Sound of frequency 3400 Hz ( = 0.10 m) isemitted. b. Sound of frequency 10 kHz ( = 0.034 m) isemitted.

c) Use these answers to give one reason why woofers (speakers witha larger diameter used for lower frequencies) and tweeters(speakers with smaller diameters used for higher frequencies) areused in speaker cabinets to improve sound quality.

d) Give another reason why different diameter speakers are used fordifferent frequencies.

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3.9 Ratings (622 Votes)

a generally the path of a wave changes due to three phenomenanamely reflectionrefractiondiffractionthe process involving the change in path of the wave it passesthrough a small opening See Answer

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