• 沒有找到結果。

 波的干涉

N/A
N/A
Protected

Academic year: 2022

Share " 波的干涉"

Copied!
31
0
0

加載中.... (立即查看全文)

全文

(1)

三、波的干涉 (P114)

 波的干涉

2014/5/12

53

Hsueh-Wen

(2)

 波的干涉

2014/5/12

54

Hsueh-Wen

(3)

2014/5/12

55

Hsueh-Wen

來源網址:

http://www.qiusir.cn/?tag=p hysics&paged=2

(4)

2014/5/12

56

Hsueh-Wen

(5)

2014/5/12

57

Hsueh-Wen

(6)

動畫:完全破壞性干涉2

(7)

波程差:P點到兩波源的的距離差

2014/5/12

59

Hsueh-Wen

波程差

(8)

 建設性干涉條件 :

 破壞性干涉條件:

2014/5/12

60

Hsueh-Wen

1 與 S 2 為同相波源

(9)

2014/5/12

61

Hsueh-Wen

波峰 波谷

建設性干涉:

(波峰和波峰重疊,或波谷和波谷重疊) 破壞性干涉:

(波峰和波谷重疊)

A、B、C D、E

Interference of water wave

http://ngsir.netfirms.com/chinesehtm/Interference2.htm

(10)

2014/5/12

62

Hsueh-Wen

http://www.olympus-ims.com/zh/ndt- tutorials/intro/breif-history/

永遠是波峰嗎?

(11)

2014/5/12

63

Hsueh-Wen

若波程差 為 波長整數倍,為完全建設性干涉。

腹線

1 與 S 2 為同相波源

(12)

2014/5/12

64

Hsueh-Wen

腹線

(13)

2014/5/12

65

Hsueh-Wen

腹線

P點波程差:

(14)

2014/5/12

66

Hsueh-Wen

P’ 點波程差:

(15)

2014/5/12

67

Hsueh-Wen

(16)

2014/5/12

68

Hsueh-Wen

(17)

2014/5/12

69

Hsueh-Wen

腹線通過波源時,退化成直線

(18)
(19)

2014/5/12

71

Hsueh-Wen

若波程差 為 半波長奇數倍,為完全建設性干涉。

節線

 )

2 - 1 (

S Q' -

QS

1 2

m

1 與 S 2 為同相波源

(20)

Q點波程差:

(21)
(22)
(23)

2014/5/12

75

Hsueh-Wen

(24)

2014/5/12

76

Hsueh-Wen

http://tupian.hudong.com/a3_44_

67_010000000000001190867569 99544_jpg.html

(25)

從洞口傳遞出來的水波變成什麼形狀?

四、繞射

(26)

 波的繞射

波遇上障礙物時  部分的波會反射回來

障礙物後方也會出現波動

2014/5/12

78

Hsueh-Wen

(27)

 波的繞射

2014/5/12

79

Hsueh-Wen

(28)

 波的繞射

當直線波穿過一個缺口時,除了原來行進方向之外,

還可從缺口繞開,向其他方向傳播。

2014/5/12

80

Hsueh-Wen

(29)

 波的繞射

缺口愈小,繞射現象愈明顯。

2014/5/12

81

Hsueh-Wen

http://ngsir.netfirms.com/en glishhtm/Diffraction.htm

(30)

2014/5/12

82

Hsueh-Wen

http://ngsir.netfirms.com/englishhtm/Diffract ion.htm

(31)

2014/5/12

83

Hsueh-Wen

參考文獻

相關文件

(wave vector)」,記做k,其大小就是波的相位 常數k,其方向就是波的傳播方向。它的三個座標

In the hydrologic cycle, water from oceans, lakes, swamps, rivers, plants, and even you, can turn into water vapor. Water vapor condenses into millions of tiny droplets that

Wave Function of the Hydrogen Atom’s Ground

Two sources to produce an interference that is stable over time, if their light has a phase relationship that does not change with time: E(t)=E 0 cos( w t+ f ).. Coherent sources:

When waves from coherent sources meet, stable interference can occur - laser light (produced by.. cooperative behavior

For ASTROD-GW arm length of 260 Gm (1.73 AU) the weak-light phase locking requirement is for 100 fW laser light to lock with an onboard laser oscillator. • Weak-light phase

a) All water users are required to restrict their water use. b) Public water utilities shall limit the monthly use of water by their custo mers. They ma y do this by

• Analog interference cancellation (RF cancellation, ~25dB reduction). • Digital interference cancellation