Video: Lub suab reflection chav kawm 9 yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg suab taug kev nyob rau hauv ib qho nruab nrab muab, nws ntaus nto ntawm lwm qhov nruab nrab thiab bounces rov qab rau lwm qhov kev coj, qhov tshwm sim no hu ua xav txog ntawm suab . Cov nthwv dej hu ua qhov xwm txheej thiab reflected suab nthwv dej.
Tsis tas li ntawd, lub suab 9th yog dab tsi?
Suab yog ib hom ntawm lub zog uas ua rau muaj kev hnov lus hauv peb pob ntseg. Kev tsim tawm ntawm Suab . Suab yog tsim los ntawm kev co ntawm cov khoom. Kev vibration yog ib ntus rov qab mus rau sab nraud ntawm cov khoom ntawm lub cev elastic lossis nruab nrab ntawm qhov chaw nruab nrab. Nws tseem hu ua oscillation.
Qhov thib ob, dab tsi yog txhais los ntawm kev xav ntawm lub suab yam ntawm qhov chaw zoo tshaj plaws rau kev xav txog lub suab? Lub bouncing rov qab ntawm suab thaum nws ntaus ib qho nyuaj nto hu ua kev xav ntawm lub suab . Suab yog xav txog zoo los ntawm nyuaj nto zoo li phab ntsa, hlau ntawv, tawv ntoo, pob zeb. Suab nthwv dej ntev ntev dua li lub teeb nthwv dej yog li lawv xav tau thaj tsam loj dua xav txog.
Kuj Paub, siv qhov kev xav ntawm lub suab yog dab tsi?
Reflections ntawm suab yog siv los ntsuas qhov deb thiab ceev ntawm cov khoom hauv qab dej. Txoj kev no hu ua SONAR. Kev ua haujlwm ntawm lub stethoscope kuj yog nyob ntawm kev xav ntawm lub suab . Hauv ib lub stethoscope, lub suab ntawm tus neeg mob lub plawv dhia mus txog tus kws kho mob pob ntseg los ntawm ntau yam reflections ntawm suab.
Lub suab tsim tau li cas hauv chav kawm 9?
Suab yog ua vim kev co ntawm cov khoom. Kev vibration yog qhov nrawm mus rau thiab tawm ntawm ib qho khoom. Ib tug stretched roj hmab band thaum plucked vibrates thiab tsim suab . Qhov cuam tshuam ua los ntawm lub cev vibrating mus los ntawm qhov nruab nrab tab sis cov khoom tsis txav mus rau lawv tus kheej.
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