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這些波動都需要 能量 ,在波傳播時,也將 能量傳播出去 ! P.45-4
受到外界能量的干擾,所產生的凸起或緊密部分,稱為 波 。 凸起 凸起 凸起 凸起 緊密 緊密
P.45-3.4 有的波動不需要介質傳播
距離 ÷ 時間=繩波的前進速率(波速)
移動方向 0 秒 2 秒 5 公尺 0 秒 距離 ÷ 時間= 5 公尺 /2 秒 P.48-10
P.45-1.8 、 p.49-5 繩波產生一次上下振動,塑膠圈也 只發生一次 上下振動
P.45-2.3.5 、 P46-17 上下擺動, 所以又稱 高低波 、聲波。 又稱 疏密波 光波、無線電波 等皆是電磁波
電場面 磁場面
間隔時間=繩波的週期
P.45-1.6.8.10 、 P.46-12 、 P48-8(1)(3).9.12.13 λ
3 個振幅 P.45-7.9 、 P.46-13.18 、 P.47-2.4.5.6.7 、 P-48-16 、 振源 振幅與能量、 4 個振幅、想像若要作波浪舞你會看哪裡? X X X X X (1/4)T (2/4)T (3/4)T (4/4)T
完整的波 週期頻率兩者相乘等於一 波長短 波長長 P.45-4 、 P.46-14.20 、 P.47-3 、 P.48-8(2)
相鄰波峰長度
一秒內波走了幾公尺 P.48-14
P.44-8.9 、 P.45-11 、 P.46-15.16.19 、 P.47-1 、 P48-11
 
 
 
 
 
 
P.49-1.4 、 p.50-18.19 、 p.51-5
 
 
p.50-10.13
 
p.49-9 、 p.50-11.12.14.15.16 、 p.51-23.2.4 、 p 跟 3-1 概念結合 介質沒變,傳聲速率就不會變! 頻率與振源有關! 振源不變,頻率就不變!
聲速與空氣之間的影響因素 溫度、濕度、風向 溫度越高 濕度越大 順風 聲速皆越快 !
p.49-3 、 p.52-7
p.51-3.6 、 p.52-13.14
 

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