wave transmits energy without transferring matter??
~ transferring matter系.....?
- 9 年前最愛解答
Apart from electromagentic waves, mechanical waves, such as sound wave, water ripples or waves on a string, require a medium to propagate. In that sense, the energy of the waves is transmitted along the medium by vibration of moleucles of the medium. The medium itself doesn't move at all.
An example is the water ripples, if you throw a stone onto a pond of still water, you could observe that the ripples spreading out, but the water mass doesn't move along with the ripples.
Electromagentic waves, on the other hand, transmi energy by the time varying electric and magnetic fields.資料來源： physics8801
- 9 年前
- 9 年前