题型:单项选择题 在双缝干涉实验中,光的波长600nm,双缝间距2mm,双缝与屏的间距为300cm,则屏上形成的干涉图样的相邻明条纹间距为()。A.0.45mm B.0.9mm C.9mm D.4.5mm 查看答案
题型:单项选择题 — Excuse me, would you lend me your calculator? —()A.Certainly. Here you areB.Please don’t mention itC.It’s nothingD.Yes, I have a hand 查看答案