Kulankhulana opanda zingwe m'moyo watsiku ndi tsiku

Kulankhulana opanda zingwe m'moyo watsiku ndi tsiku  

Wave:● Chofunika kwambiri cha kulankhulana ndicho kufalitsa uthenga, makamaka mu mawonekedwe a mafunde.  ● Mafunde amagawidwa kukhala mafunde opangidwa ndi makina, mafunde a electromagnetic, mafunde a matter ndi mafunde amphamvu yokoka (quantum communication).  ● Nyama ndi zomera zinaphunzira kugwiritsa ntchito mafunde a phokoso, kuwala kwa infrared ndi kuwala koonekera pofufuza zinthu.

mafunde a electromagnetic:

Pakadali pano, mafunde omwe amagwiritsidwa ntchito kwambiri ndi ma electromagnetic wave, omwe amatha kugawidwa m'magawo angapo:

●Radiyo (R) (3Hz~300MHz) (TV, wailesi, ndi zina zotero)

● Microwave (IR) (300MHz~300GHz) (rada, ndi zina zotero)

● Infrared (300GHz~400THz)

●Kuwala kowoneka (400THz~790THz)

● UV

● X-ray

● cheza cha gamma

Kugwiritsa Ntchito Tsiku ndi Tsiku:

  Magulu amagawidwa ndikugwiritsidwa ntchito pazifukwa zosiyanasiyana, monga AM, FM, kuwulutsa kwa TV, mauthenga a satana, ndi zina zotero, mutha kulozera ku zikalata zovomerezeka zamayiko ena.GSM, 3G, ndi 4G onse ndi ma microwave.

Ma satellites amalumikizananso ndi ma microwave.Ma frequency oyenera kwambiri olumikizirana ndi satellite ndi 1-10GHz frequency band, ndiye kuti, band ya ma frequency a microwave.  Pofuna kukwaniritsa zofunikira zambiri, magulu atsopano afupipafupi aphunziridwa ndikugwiritsidwa ntchito, monga 12GHz, 14GHz, 20GHz ndi 30GHz.Huhutong ndi satellite TV, yothandizidwa ndi satellite ya Zhongxing 9.Mwa kuyankhula kwina, kulongedza kwa pulogalamu yowulutsa pompopompo ndi yamphamvu kwambiri, ingopitani patsamba lovomerezeka kuti muwone.Mafoni a satellite (a maulendo ndi zombo) ali kale kukula kwa foni yamakono.Bluetooth ndi WiFi ndi ma microwave.Ma air conditioners, mafani, ndi zowongolera pa TV zamtundu wamtundu zili ndi infrared.NFC ndi wailesi (Near Field Communication ndi ukadaulo wapawayilesi wamfupi, wothamanga kwambiri womwe umagwira ntchito pa 13.56MHz pamtunda wa 20cm).Ma tag a RFID (ma tag otsika (125 kapena 134.2 kHz), ma tag apamwamba kwambiri (13.56 MHz), ma tag a UHF (868~956 MHz) ndi ma tag a ma microwave (2.45 GHz))