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Physics, 03.07.2021 14:00 meth77

Trong phòng thí nghiệm, một sinh viên thực hiện phép đo chiết suất n của một vật liệu X bằng cách đặt lớp vật liệu X dày d 500 nm lên giá đỡ xung quanh là không khí. Chiếu thẳng góc chùm ánh sáng nhìn thấy lên vật liệu X. Quan sát các tia phần xą. sinh viên thấy có 2 tia sáng có bước sóng 4 = 500 nm và 2 = 400 nm còn thiếu trong quang phổ ánh sáng nhìn thấy. a) Tính chiết suất n của vật liệu X b) Đặt lớp vật liệu này lên bản nhôm có chiết suất n 2,75. Lặp lại thí nghiệm tương tự. Hỏi sinh viên quan sát thấy các bước sóng nào trong phổ ánh sáng nhìn thấy? Biết phổ của bước sóng ánh sáng nhìn thấy có bước sóng 380 nm

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