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Energy and Uncertainty in Quantum Mechanics
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If a particle's position is precisely known, what is the most direct consequence on its momentum according to quantum mechanics?

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A

Its momentum becomes completely certain and predictable.

B

Its momentum becomes highly uncertain and difficult to measure.

C

Its momentum increases indefinitely.

D

Its momentum remains constant regardless of position.

Understanding the Answer

Let's break down why this is correct

Knowing a particle's location very well means the rule that links position and momentum says the momentum values become spread out. Other options are incorrect because The idea that a precise position gives a definite momentum is a common mistake; The belief that a precise location makes the momentum grow infinitely is wrong.

Key Concepts

Heisenberg Uncertainty Principle
Momentum and Position Measurement
Quantum Mechanics Fundamentals
Topic

Energy and Uncertainty in Quantum Mechanics

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medium level question

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Definition
Definition

This topic delves into energy and uncertainty in quantum mechanics, covering concepts like the Heisenberg Uncertainty Principle, expectation values, and stability of systems like the Hydrogen atom. It explores the relationship between energy, momentum, and uncertainty.

Topic Definition

This topic delves into energy and uncertainty in quantum mechanics, covering concepts like the Heisenberg Uncertainty Principle, expectation values, and stability of systems like the Hydrogen atom. It explores the relationship between energy, momentum, and uncertainty.

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