[DSE Physics] Particle Motion in Transverse Wave 橫波的粒子運動

[@Edmond7468]

4:04 呢到應該係(n-1/2)λ? (for n=1,2,3,4,5... )

[@MarcYam]

Edmond Yuen 應該係n=0,1,2,3,4,5...打漏左!

[@EdwardChan.999]

0:35 好想唱鄭伊健果首《極速》...

[@LLJW-df7qn]

痴線睇你啲片真係好鬼死正 學物理之餘學埋英文 希望你會keep住做 Support u！

[@LLJW-df7qn]

英夾中既教學好好👏🏻

[@MarcYam]

KW s 放心，會繼續出的。 btw, 唔好學壞呀，chok唔係英文黎呀

[@ln0-i2w]

點解direction of wave係向左，啲particles on the crest或tough 唔會move upward and downward? 畫左個wave出來，睇落好似有郁，求解

[@MarcYam]

因為嗰點其實係啱啱momentarily at rest既，你畫之後一刻個wave出黎時，佢好似向上/向下郁，但如果你畫佢之前一刻個wave出黎既話，佢其實係向下/向上郁，咁就說明咗，佢喺而家你見到既呢一刻，佢係啱啱轉緊方向既一刻。

[@ronniewong5588]

幾時出熱學

[@youknowwho8925]

學校Quiz 出咗一題, 佢俾咗個一個wave 嘅 graph 你, 但係個wave唔係sinusoidal, 而係可以以y=0.1|sinx| 嚟形容嘅. 你可以喺desmos plot 出嚟。我想問呢個wave嘅amplitude點解唔係0.05🤦🏻‍♀️

[@MarcYam]

其實問題係關於amplitude 嘅定義，amplitude 嘅意思係largest displacement from equilibrium position。而我估你誤會咗，以為amplitude 係最高到最低嘅距離除二？

[@youknowwho8925]

@@MarcYam 咁係點定義equilibrium position

[@MarcYam]

@@youknowwho8925 equilibrium Position 即係undistributed position，即係not net force嘅一個position。

[@youknowwho8925]

@@MarcYam them what if it ask about a weird wave that has a really random shape? How do I find the amplitude

[@MarcYam]

Find the maximum displacement from equilibrium position. The definition of amplitude is the same.

[@鄧幸軒]

When will u publish heat and gas

[@MarcYam]

鄧幸軒 I'll try my best to upload it as soon as possible, but it is not possible for me to upload it very soon.

[@anson1755]

會出縱波?

[@MarcYam]

大魔王 呢個幫唔幫到手？ kzbin.info/www/bejne/iZO9h52caLOqm68

[@Gewi6]

Out of phase 包唔包括埋antiphase?

[@MarcYam]

包，唔係in phase既Case就叫做out of phase

[@aaronnchannn5885]

@@MarcYam out of phase 吧？？

[@MarcYam]

@@aaronnchannn5885 謝謝你