九年级学生的业余时间去哪了 英语作文加中文翻译

2025-04-05 02:28:15
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回答1:

to the screen is different. This suggests that from slit light reach the screen is no longer in-phase: some local fluctuations cancel each other out, other places they will reinforce each other, results in the formation of bright and dark stripes characteristic pattern.
Amazing is that if the light source is rep