Physics - Photoelectric Effect - Definitive Nature of Light?

Light is a form of energy.

According to Planck's equation,

E=hu where,h is Planck's constant and u is frequency of radiation.

According to Einstein's mass-energy relation,

E=mc^2, c being the speed of light.

If we equate the two equation,

hu=mc^2 which shows that light possesses a dual nature,frequency signifying wave nature and mass signifying particle nature.It depends on how light behaves under different conditions which speak of it's property.Interference and diffraction of light are properties that suggest of the wave nature whereas photoelectric effect and einstein's mass-energy relation suggest of particle nature.

There is no definitive nature,it has a dual nature.Super-string theory says that every atom is further smaller in the form of strings,and the way these strings vibrate determines the nature of things,like change in mode of vibration would make an electron in particle form to a form of wave.String theory is yet to be experimentally proven but has been able to give a soundly logical mathematical interpretations.

Dual nature of light has been taken as a fact,a well-accepted theory having no exact explanation as to why does the duality arise?

the photoelectric theory supports the particle nature of light, much like the interference experiments (Young,) support the wave nature of light.

It is impossible to disprove either of these models, as they both accurately describe the nature of light under different circumstances.

It is for this reason that light is considered both a particle and a wave, (particle wave duality). Quantum mechanics shows us that we can consider light particles as a superposition of an infinite number of waves with a continuous distribution of wavenumbers.

I would also like to add that it is equally as likely that light is NEITHER a particle nor a wave, but just displays these properties when we conduct certain experiments on it......

I would say that as well as the photoelectric effect, any experiment which demonstrates the quantisation of light like the examples above would support the model.

Compton scattering is the real evidence for the wave like nature of light. Photoelectric effect is normal taught at A level because it easier to understand and less mathematical.

Describe The Nature Of Light

The phenomenon of blackbody radiation is one. In fact it was in the effort to explain this phenomenon that led to the inference that light behaves in another way as a stream of particles.

http://scienceray.com/physics/the-top-five-laws-of...

if light was purely a wave, amplitude should control whether or not electrons are ejected; however, because it is not, you can increase the amplitude of the electromagnetic wave however much you want but electrons are not ejected until you increase the frequency (or the individual energy of each photon) enough that a photon can knock an electron out of orbit.

interferometry is one