What is an dual nature?

Answer 1

This is the statement from quantum physics that all matter exhibits both wave and particle like properties, this implies that things like sunlight that is most commonly referred to as waves are also actually particles referred to as photons too. This was first tied together by Einstein in the early 1900's.

The engry of these things is related by the formula E=hF

E= energy

h= plancks constant

F= frequency of light

this relationship explains how different "colours" of light(i.e. from near infared to far ultraviolet) have differing energies.

This wave particle duality is also important for hisenbergs uncertainty principle, as following on from the initial statement it is nonsensical to discuss the precise location of a wave on a string, particles do not have perfectly precise positions; likewise, just as it is nonsensical to discuss the wavelength of a "pulse" wave traveling down a string, particles do not have perfectly precise momenta (which corresponds to the inverse of wavelength).

Moreover, when position is relatively well defined, the wave is pulse-like and has a very ill-defined wavelength (and thus momentum). And conversely, when momentum (and thus wavelength) is relatively well defined, the wave looks long and sinusoidal, and therefore it has a very ill-defined position.

This wave particle duality has been conclusively shown in many larger molecules also e.g. tetraphenylporphyrin which is quite a substantial molecule.

Answer 2

properties like interference,diffraction and polarisation are

explained by wave nature of light and photoelectric effect and compton effect are explained by quantum nature of light has dual nature particles as well as wave

Answer 3

According to the de Broglie concept of matter waves, the matter has dual nature. It means when the matter is moving it shows the wave properties (like interference, diffraction etc.) are associated with it and when it is in the state of rest then it shows particle properties. Thus the matter has dual nature. The waves associated with moving particles are matter waves or de-Broglie waves.

Answer 4

Yes.

Sub-atomic particles exhibit both particle effects (no surprise) but also wave effects. This has been known since about 1927.