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範例:單狹縫繞射與光程差

(1)單狹縫其寬度自左邊緣a至右邊緣g共分六等分,以abcdefg標明位置,d為中點,則在屏上中央亮帶右方第一亮紋之中線至ag光程差為(設入射單色光波長為λ) (A)λ/6 (B)λ/3(C)λ/2(D)λ(E)3λ/3

(2)上題中屏上某點至ab兩點光程差為λ/3,則此點為中央線側(A)第一暗紋(B)第二暗紋(C)第一亮紋中線(D)第二亮紋中線(E)第三亮紋中線。【附中】


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