Question

According to Heisenberg's uncertainty principle, which of the following statement is true ?

• A. electrons are too small to be studied.
• B. every photon is exactly the same size.
• C. the more you know about the momentum of an electron, the less you can know about its position.
• D. the more you know about the energy of a photon, the less you can know about its frequency.
• E. you cannot state with accuracy the number of electrons in atom.

Answer 1

The correct option is C the more you know about the momentum of an electron, the less you can know about its position.

Heisenberg uncertainty principle states that it is impossible to determine the exact position and the exact momentum of the particle simultaneously.

According to Heisenberg uncertainty principle, $\Delta x.\Delta p\ge \frac{h}{4\pi }$

Thus lesser the error in the momentum, more will be the error in the position of the particle.