Wave- particle duality
It is the concept that every elementary particle or quantic entity may be partly described in terms not only of particles, but also of waves.
The exhibition of both wavelike and particlelike properties by a single entity as electrons undergo diffraction and can interfere with each other as waves, but they also act as pointlike masses and electric charges.
In quantum mechanics, the condition that allows every quantum to appearlike a wave in some experiments and like an elementary particle in others.
It seems as though we must use sometimes the one theory and sometimes the other, while at times we may use either. We are faced with a new kind of difficulty.
The two sided nature of the electron is known as the Wave-Particle Duality: The property of particles behaving as waves and the property of waves behaving as particles as well as waves. Although the duality is not very effective in large matter.
Planck's hypothesis states that a quantum of energy was related to the frequency by this equation E = hv
