Why was Townes’s early work with stimulated emissi...
Câu hỏi: Why was Townes’s early work with stimulated emission done with microwaves?
A He was not concerned with light amplification.
B It was easier to work with longer wavelengths.
C His parents Schawlow had already begun work on the laser.
D The laser had already been developed.
Câu hỏi trên thuộc đề trắc nghiệm
Đề luyện thi Đánh giá năng lực môn Anh - số 4