Interference diffraction coherent 35 5 interference Fig 35

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Interference (干涉) diffraction (繞射) 同調性coherent(§ 35 -5)

Interference (干涉) diffraction (繞射) 同調性coherent(§ 35 -5)

雙狹縫干涉(interference) Fig 35 -8 • 1801年，Young干涉實驗 • 遠場光學vs. 近場光學 • Huygens principle

雙狹縫干涉(interference) Fig 35 -8 • 1801年，Young干涉實驗 • 遠場光學vs. 近場光學 • Huygens principle

雙狹縫干涉(interference)

雙狹縫干涉(interference)

干涉(interference) & 繞射(diffraction) Fig. 36 -10 亮紋或暗紋？ Fig. 36 -5 亮紋或暗紋？

干涉(interference) & 繞射(diffraction) Fig. 36 -10 亮紋或暗紋？ Fig. 36 -5 亮紋或暗紋？

雷射 • laser名稱的來源 – Light Amplification by Stimulated Emission of Radiation s s 雷射的特性

雷射 • laser名稱的來源 – Light Amplification by Stimulated Emission of Radiation s s 雷射的特性 同調性coherent 雷射的原理 氦氖雷射的原理

雷射§ 40 -11, § 40 -12 Light Amplification by Stimulated Emission of Radiation

雷射§ 40 -11, § 40 -12 Light Amplification by Stimulated Emission of Radiation

雷射的原理 § 40 -12 物質與光子的交互作用 Fig. 40 -19 • Absorption 吸收 • hf =

雷射的原理 § 40 -12 物質與光子的交互作用 Fig. 40 -19 • Absorption 吸收 • hf = Ex－E 0 • Ex：激態excited state； E 0：基態ground state • spontaneous emission 自發輻射 • metastable states 暫穩態 • stimulated emission 受激輻射 • ★population inversion 粒子數反轉 Fig. 40 -20 • 熱平衡時粒子數的分佈 – 例題：Sample Problem 40 -6 – Homework：ch 40 Problem 47 Question 14

He-Ne Gas Laser • He-Ne Gas Laser – He 80%, Ne 20% – Ne

He-Ne Gas Laser • He-Ne Gas Laser – He 80%, Ne 20% – Ne 為此雷射之活性介質 (active medium) • He-Ne Gas Laser的能階 – E 2－ E 1= ？ e. V – Question 13 • E 3(20. 61 e. V)≠E 2(20. 66 e. V) – Ch 40 Problem 58：火星 上的CO 2雷射 Fig. 40 -22

Interference diffraction coherent 35 5 interference Fig 35Interference diffraction coherent 35 5 interference Fig 35
Interference diffraction coherent 35 5 interference Fig 35Interference diffraction coherent 35 5 interference Fig 35
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