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第12章波動p.95第3題
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波動
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Joanne Wu
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Mar 15, 2013, 11:19:21 PM
3/15/13
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請問波動p.95第3題
正弦波向右行進,介質振動的瞬時速度與位置關係圖。
質點振動速度如果是波速乘以質點切線斜率的話,這題選(D)是因為sin微分後是cos,所以波形仍然是曲線而非直線嗎?
謝謝解答。
討論區板主
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Mar 22, 2013, 8:13:56 AM
3/22/13
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您好:
您的敘述大致上是正確的
這題行進波函數可寫成
y(x, t) = Rsin(kx-ωt)
質點振動速度意思是y對t微分
可得出速度是一個cos的形式
Joanne Wu於 2013年3月16日星期六UTC+8上午11時19分21秒寫道:
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