Light shows wave properties through different conditions such as reflection, diffraction, refraction, Poisson's spot, polarization, and interference.
... monitored with a detector designed to detect wave characteristics. When monitored with a detector designed to detect particle characteristics, light demonstrates those too.
Thomas Young
Reflective Polarization from a surface.
a wave model of light.
The particle (photon) and wave (wavelength) characteristics of light. E =hf = zQ2c/w where Q is the photon charge and w is the wavelength. One problem with the above answer: the charge of a photon is zero. E(photon) = hf where 'h' is Planck's Constant and 'f' is the frequency of the vibrations of light. hf = hc/w where 'c' is the speed of light and 'w' is the wavelength of the light. The more correct answer on "What are the dual characteristics of light" is that light will sometimes act like a wave and sometimes act like a particle -- and what it acts like depends on what experiment you are performing.
... monitored with a detector designed to detect wave characteristics. When monitored with a detector designed to detect particle characteristics, light demonstrates those too.
-- If the detector is designed to detect wave characteristics, then light exhibits all the characteristics and behavior of a wave when it encounters that detector. -- If the detector is designed to detect particle characteristics, then light exhibits all the characteristics and behavior of a particle when it encounters that detector.
Thomas Young
Light doesn't change from one to the other. It's both all the time. If you design an experiment that reveals wave characteristics, light delivers them, and if you design an experiment that reveals particle characteristics, light delivers them too. If anyone asks "Is light a wave or a particle ?", the best answer is "Yes".
Light travels at 299,792,458 m/s as both a wave and a particle. Light demonstrates aspects of both. It does not require any sort of medium to travel.
Reflective Polarization from a surface.
Not sure what you mean, as the photon is classified as a separate particle. Light, like electrons, sometimes displays particle characteristics and sometimes displays wave characteristics.
a wave model of light.
A sine wave is the graph of y = sin(x). It demonstrates to cyclic nature of the sine function.
The particle (photon) and wave (wavelength) characteristics of light. E =hf = zQ2c/w where Q is the photon charge and w is the wavelength. One problem with the above answer: the charge of a photon is zero. E(photon) = hf where 'h' is Planck's Constant and 'f' is the frequency of the vibrations of light. hf = hc/w where 'c' is the speed of light and 'w' is the wavelength of the light. The more correct answer on "What are the dual characteristics of light" is that light will sometimes act like a wave and sometimes act like a particle -- and what it acts like depends on what experiment you are performing.
A sonic wave.
The speed calculated for such waves, which happened to be precisely the speed of light.