Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Speed
B
Time
C
Mass
D
Acceleration
Understanding the Answer
Let's break down why this is correct
Answer
In quantum mechanics, energy is paired with time, giving the energy‑time uncertainty relation. In classical mechanics, the analogous pair is position and momentum: the more precisely you know a particle’s position, the less precisely you can know its momentum, and vice versa. This mirrors how energy and time are linked in quantum theory. For example, a ball thrown straight up has a well‑defined position at the peak, but its velocity (momentum) is uncertain because of the height‑velocity relationship.
Detailed Explanation
Energy and time are linked by the uncertainty principle: if you know energy very well, the exact time it happened becomes fuzzy. Other options are incorrect because Speed is a rate of change of position, not a pair that limits how exactly we know energy; Mass is a measure of how much matter an object has, but it doesn’t set a limit on how precisely energy can be known.
Key Concepts
Heisenberg Uncertainty Principle
Classical Mechanics
Quantum Mechanics
Topic
Energy and Uncertainty in Quantum Mechanics
Difficulty
easy level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1In quantum mechanics, the uncertainty principle indicates that the more accurately we know a particle's position, the less accurately we can know its momentum. Which of the following statements best describes this relationship in terms of probabilities?
easyComputer-science
Practice
2
Question 2In quantum mechanics, how does the concept of operators relate to the uncertainty principle, specifically in measuring the energy of a particle?
mediumComputer-science
Practice
3
Question 3In the context of quantum mechanics, how does the complementarity principle relate to the uncertainty in measuring both the energy and the position of entangled particles?
hardComputer-science
Practice
4
Question 4Arrange the following concepts in the correct logical sequence that describes the interactions of energy and uncertainty in quantum mechanics: A) Measurement of position, B) Application of the Heisenberg Uncertainty Principle, C) Determination of momentum, D) Calculation of expectation values.
hardComputer-science
Practice
5
Question 5In quantum mechanics, the uncertainty principle indicates that the more accurately we know a particle's position, the less accurately we can know its momentum. Which of the following statements best describes this relationship in terms of probabilities?
easyComputer-science
Practice
6
Question 6In quantum mechanics, how does the concept of operators relate to the uncertainty principle, specifically in measuring the energy of a particle?
mediumComputer-science
Practice
7
Question 7In the context of quantum mechanics, how does the complementarity principle relate to the uncertainty in measuring both the energy and the position of entangled particles?
hardComputer-science
Practice
8
Question 8Energy in quantum mechanics is to uncertainty as position in classical mechanics is to what?
easyComputer-science
Practice
9
Question 9Arrange the following concepts in the correct logical sequence that describes the interactions of energy and uncertainty in quantum mechanics: A) Measurement of position, B) Application of the Heisenberg Uncertainty Principle, C) Determination of momentum, D) Calculation of expectation values.
hardComputer-science
Practice
Ready to Master More Topics?
Join thousands of students using Seekh's interactive learning platform to excel in their studies with personalized practice and detailed explanations.