Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound...
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Transcript of Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound...
![Page 1: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/1.jpg)
Problem no. 4
TEAM TALNET
![Page 2: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/2.jpg)
Discharging an electronic flash unit neara cymbal will produce a sound from the cymbal.
Explain the phenomenon and investigate the relevant parameters.
A photo of cymbal
![Page 3: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/3.jpg)
Theoretical background Determining main cause of emitted sound Measuring of sound Results Conclusion
![Page 4: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/4.jpg)
Flash interacts with the material of the cymbal
Variants By flashing the sound wave is generated
This sound interact with the cymbal and emits another sound wave
Pressure wave Electromagnetic induction Light
![Page 5: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/5.jpg)
A wave based on shift of grossness of air which is emitted when the flash is triggered could make the cymbal to emit sound.
We tried clap hands putting of transparent materials between flash
and cymbal (glass, plastic materials) flash on thermistor
![Page 6: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/6.jpg)
When the flash is triggered, a very high current goes through the gas-filled tube. Therefore could be generated changing magnetic field that might take effect on cymbal.
Experiments flashing on razor placed on edge of table in
near nonbalanced state nonconductor between flash and cymbal using flash on paper
![Page 7: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/7.jpg)
All results of experiments are indicating, that the main cause of this phenomenon is light (photons).
![Page 8: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/8.jpg)
We have measured following characteristics of flash and cymbal
We observed: difference between different places on cymbal decreasing sound intensity with increasing
distance flash from cymbal dependence on cymbal´s colour comparison energy of released flash and
kinetic energy of falling paperclip
![Page 9: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/9.jpg)
We have measured intensity of sound emited by cymbal
We have observed quick decrease of sound with increasing distance.
Green line – distance 1 cmBlue line – distance 6 cmRed line – distance 17 cm
![Page 10: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/10.jpg)
We tried to find entries to figure out how much energy is released from gas-filled tube when flash is triggered.
We have found these approximated data: Duration of flash Power of flash Factor fo conversion from electrical energy to
optical energy Flash is acting approximately in area of 1 sr
![Page 11: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/11.jpg)
We tried to determine the energy of photons, which are emitted by flash. We used following relations:
Purple – fall of paperclip from 15 cm heightBlue – fall of paperclip from 2 cm heightRed – released flash from 1 cm distance
Emax – potential energy of paperclip in specific height (h)m – mass of paperclipg – gravity constantEf – aproximated energy of one flasha – aproximated coefficientk – number of photonsh – Planck constantf – frequency of average photonc – speed of lightλ – wavelength of average photon
![Page 12: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/12.jpg)
We have determinated, that the main cause of is light (photons)
We have observed basic relations between flash and emitted sound.
![Page 13: Problem no. 4 TEAM TALNET. Discharging an electronic flash unit near a cymbal will produce a sound from the cymbal. Explain the phenomenon and investigate.](https://reader035.fdocuments.us/reader035/viewer/2022062322/56649e305503460f94b20bfd/html5/thumbnails/13.jpg)
TEAM TALNET