Question

The uncertainty principle and the concept of wave nature of matter were proposed by _____ and _____, respectively.

• A. de-Broglie and Heisenberg
• B. Heisenberg and de-Broglie
• C. Max planck and Avogadro
• D. None of the above

Answer 1

The correct option is B Heisenberg and de-Broglie

According to the de-Broglie hypothesis, particles behave as waves which are called matter waves. The wavelength (de-Broglie wavelength) of the matter-wave corresponding to a particle of momentum p is given by,
$\lambda =\frac{h}{p}$
Here, ($h$) = Planck’s constant.
The de-Broglie wavelength is inversely proportional to the momentum (hence mass) of a particle.
Heisenberg’s uncertainty principle states that it is impossible to measure or calculate exactly, both the position and the momentum of an object, simultaneously. This principle is based on the wave-particle duality of matter. Although Heisenberg’s uncertainty principle can be ignored in the macroscopic world , it holds significant value in the quantum world.