Question

Which one of the following branch of physics deals the impossibility of making simultaneous, arbitrarily precise measurements of the momentum and the position of an electron.

• A. thermodynamics
• B. quantum mechanics
• C. classical electrodynamics
• D. special relativity
• E. general relativity

Answer 1

The correct option is B quantum mechanics

Heisenberg's Uncertainty Principle, as a part of quantum mechanics, theorizes that the position and momentum of an electron cannot be measured precisely at the same time, that is, there is a minimum associated natural error in measurement of the two simultaneously.

The error in measurement of the two is quantified as $\Delta x.\Delta p\ge \frac{\hslash }{2}$