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2 năm trước
Điều nào sau đây là sai khi nói về sóng điện từ ? A. Trong quá trình lan truyền, sóng điện từ mang theo năng lượng B. Sóng điện từ là sóng ngang C. Sóng điện từ có tần số tăng khi truyền từ không khí vào nước. D. Sóng điện từ có thể xảy ra hiện tượng phản xạ, giao thoa và nhiễu xạ.
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