13. 科學家用 X-光繞射分析一未知晶體的結構,如 X-光的波長 (λ) 為 1.54Å,在繞射光與晶
面夾角為 30 度時產生第一亮帶,請問此晶體的單位晶格的間距?
(A) 1.54Å
(B) 1.78Å
(C) 3.85Å
(D) 0.77Å
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統計: A(377), B(23), C(16), D(76), E(0) #1815279
統計: A(377), B(23), C(16), D(76), E(0) #1815279
詳解 (共 3 筆)
#7181456
[Bragg's equation]
17. 用波長為 1.36 Å 的 X 光分析某晶體,在Θ = 24.5°產生反射。假設 n = 1,此晶體中原子層之間的距離是多少? (sin24.5o = 0.415)
(A) 0.610 Å
(B) 1.64 Å
(C) 3.28 Å
(D) 6.56 Å
答案:B
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3. X rays of wavelength λ= 0.250 nm are incident on the face of a crystal at angle θ, measured from the crystal surface. The smallest angle that yields an intense reflected beam is θ = 14.5°. Which of the following gives the value of the interplanar spacing d? ( sin 14.5°
1/4 )
1/4 )(A) 0.125 nm
(B) 0.250 nm
(C) 0.500 nm
(D) 0.625 nm
(E) 0.750 nm
答案:C
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