What are the pigeons doing outside? Eating, sleeping, propagating!门外的那些鸽子在干什么? 吃, 睡, 繁衍!The model shows a wave propagating from left to right through air.该模型表明,波从左至右通过空气.First, why do we get light propagating at all?首先, ...
First, why do we get light propagating at all?首先, 我们来看看光为什么可以传播?The model shows a wave propagating from left to right through air.该模型表明,波从左至右通过空气.What are the pigeons doing outside? Eating, sleeping, propagating!门外的那些鸽子在...