Thus, we cannot determine its velocity accurately although its position has been measured accurately. Thus, a small value of ‘λ’ makes the momentum of the photon large and an unknown part of it is transformed to the electron at the time of collision which changes the velocity of an electron by an unknown amount. According to de Broglie equation, λ = h/P or P = h/λ. Consider particle nature of light, to see an electron there must be at least one collision of a photon with the electron. Explanation of Heisenberg Uncertainty Principle:įor the proper location of a small particle like an electron, light radiation of high energy is required which is of very small wavelength (1Å or less).

there is always uncertainty in the simultaneous determination of both position and momentum. This fact was first noted by Werner Heisenberg’s in 1927 and he proposed a principle known as Heisenberg’s Uncertainty Principle which states that “it is impossible to measure at any given moment both the position and momentum (or velocity) of small particles in motion with the desired accuracy” i.e. Significance of Heisenberg Uncertainty Principle:ĭue to the dual nature of matter and radiation, it is impossible in case of small particles such as electrons to determine simultaneously both position and velocity (or momentum) with absolute accuracy.

Explanation of Heisenberg Uncertainty Principle:.

Heisenberg uncertainty principle app