A particle’s kinetic energy cannot be measured accurately at any time
Both momemtum and energy of a particle can be known with absolute certainly
It is possible to measure exactly both the position and momentum of a particle at the same time
The complete knowledge of the position of a particle implies the complete ignorance of its energy
The uncertainty in our knowledge of energy and the duration taken to measure it, are each less than Planck’s constant.
Explanation
Video Explanation
No video available
Post your Contribution
Discussions (7)
The correct answer is: D. The complete knowledge of the position of a particle implies the complete ignorance of its energy
Explanation:
This question relates to Heisenberg's Uncertainty Principle, which states that:
It is impossible to simultaneously know both the exact position and exact momentum (or energy and time) of a particle with absolute precision.
Let’s briefly go through the options:
A. Incorrect — Kinetic energy can be measured accurately, but not along with precise position.
B. Incorrect — The Uncertainty Principle forbids knowing both momentum and energy with certainty at the same time.
C. Incorrect — This violates the Uncertainty Principle.
D. ✅ Correct — Knowing the exact position implies maximum uncertainty in momentum, which relates to energy. So complete knowledge of position means we cannot know the energy exactly.
E. Incorrect — The product of uncertainties in energy and time is greater than or equal to Planck’s constant divided by 4π, not each being less.
So the best answer is:
👉 D. The complete knowledge of the position of a particle implies the complete ignorance of its energy.
The uncertainty principle states that we can't know with certainty the position and momentum of a body of an electron in an orbital simultaneously
The correct answer is: D. The complete knowledge of the position of a particle implies the complete ignorance of its energy
Explanation:
This question relates to Heisenberg's Uncertainty Principle, which states that:
It is impossible to simultaneously know both the exact position and exact momentum (or energy and time) of a particle with absolute precision.
Let’s briefly go through the options:
A. Incorrect — Kinetic energy can be measured accurately, but not along with precise position.
B. Incorrect — The Uncertainty Principle forbids knowing both momentum and energy with certainty at the same time.
C. Incorrect — This violates the Uncertainty Principle.
D. 
Correct — Knowing the exact position implies maximum uncertainty in momentum, which relates to energy. So complete knowledge of position means we cannot know the energy exactly.
E. Incorrect — The product of uncertainties in energy and time is greater than or equal to Planck’s constant divided by 4π, not each being less.
So the best answer is:
D. The complete knowledge of the position of a particle implies the complete ignorance of its energy.
