Trong thí nghiệm Y-âng về giao thoa ánh sáng : khoảng cách giữa hai khe là 0,5 mm ; khoảng cách từ mặt phẳng chứa hai khe đến màn quan sát là 1,5 m ; ánh sáng đơn sắc chiếu vào hai khe có bước sóng 0,6 μm.
Solve the following word problems. 1. The ratio of red marbles and blue marbles that Carlo has is 8: 3. When he exchanged 35 red marbles for 20 blue marbles from his brother, he was left with equal number of red and blue marbles. How many red and blue marbles did he have at the beginning? How many red and blue marbles did he have now?
