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anhavvd
2 năm trước
Trong thí nghiệm Iâng. Biết lamda = 0,6µm, a = 2mm, D = 2m. Bề rộng miền giao thoa trên màn là 25,6mm. Số vân giao thoa quan sát được trên màn (kể cả hai biên nếu có) là: A. 21 B. 23 C. 41 D. 43 Giúp mình giải câu 30 nha❤
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