Yes, once they"re the end of phase. In straightforward terms, one wave has a crest while another has a trough, lock cancel.

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Bees buzz b/c of the very fast price of the fluttering of their wings. This to produce disturbances in the wait medium, which leader to the buzzing sound
Sound from source A has twice the frequency of sound from resource B. Compare the wavelengths of sound native the two sources.
In Olympic competition, a microphone detects the sound the the starter"s gun and also sends that electrically to speakers at every runner"s beginning block. Why?
Because the rate of sound is lot slower than the speed of electricity, this reduce the split-second hold-up between firing the gun and also the sound getting to the jogger furthest far from the gun.
If a bell is ringing within a bell jar, we deserve to no longer hear it as soon as the air is pumped out, however we can still check out it. What differences in the properties of sound and also light walk this indicate?
If the frequency that a sound is doubled, what adjust will take place in the speed? What adjust happens to its wavelength?
The rate doesn"t change. Wavelength is speed/frequency, for this reason if the frequency doubles and also the speed stays the same, the wavelength is reduced in half.

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Why deserve to a nervous of the ground native a distant explosion it is in felt prior to the sound of the explosion have the right to be heard?
Ultrasonic waves have many applications in modern technology and medicine. One benefit is that huge intensities deserve to be provided without hazard to the ear. What is another advantage of their quick wavelength? (Why carry out microscopists usage blue light fairly than white light to check out detail?)
- If an object is smaller than a wave"s wavelength, then the tide will just defract around the object, instead of mirroring off of the (reflection permits you to check out objects). This is why objects smaller sized than the wavelength of clearly shows light perform not have actually color and also cannot be seen through light microscopes.- So, the little wavelength of ultrasonic waves means that they have the right to reflect off of very tiny objects, permitting us to view them.
An echo is a reflect sound and also thus, the soot of an echo is less than that of the initial sound
Suppose a piano tuner hears 3 beats per second when listening to the merged sound from a tuning fork and also the piano wire being tuned. After contempt tightening the string, 5 to win per 2nd are heard. Must the string it is in loosened or tightened?
What is the wavelength that a 340-hz ton is air? What is the wavelength that a 34,000-hz ultrasonic tide in air?
- wavelength = velocity/frequency.- rate of sound is about 340 m/s, therefore the wavelength of a 340-hz ton is 340/340 ~1 m- of an ultrasonic wave: 340/34000 ~0.001 m or 1 mm
An oceanic depth-sounding ship surveys the s bottom with ultrasonic tide that take trip 1530 meters/second in seawater. Just how deep is the water directly below the vessel if the time hold-up of the echo to the ocean floor and back is 6 seconds?


Engineering Electromagnetics (Irwin electronic devices & computer system Enginering)8th EditionJohn Buck, wilhelm Hayt