While we are
in contact every day light, using light, but to ask: Just what is?
Little effort has been able to give a precise definition. In classical
physics, particle theory that light is a composition of independent
photons. To the late seventeenth century, Christian Huygens proposed a
wave theory that just a special kind of wave, rather than a collection
of particles. 1807 Thomas Young also ran out of the diffraction
behavior confirms the theory. May make in people's decision to accept
the new wave theory at the same time, but do not know how to explain
the particle theory with well understood behavior of specular
reflection of light. Light in the end what is a particle or a wave? In
1905 the famous Einstein photoelectric effect that ultraviolet
irradiation surface, the energy will be passed to the surface
electronics, so that the shackles from the nucleus, released from the
surface, so Einstein would be interpreted as a kind of light a
collection of energy - photons. Descendants of this theory in turn
further deepened, creating quantum physics, believe that all matter has
wave-particle two-phase nature, but the proportion between the two are
different, so light is a wave, a photon at the same time is again
posed. Yet, as a unique substance, it still accounts for the main
aspects of volatility. |
