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Chapter 39: Q. 6 (page 1136)

FIGURE Q39.6 shows wave packets for particles 1, 2, and 3. Which particle can have its velocity known most precisely? Explain.

Short Answer

Expert verified

The velocity of particle 1 is the most exact.

Step by step solution

01

Given information

Given: Graphs for wave functions of each particle.

02

Which particle has most precise wavelength.

When compared to particle 1, the wave functions of particles 2 and 3 are less spatially stretched. The more specific the position is known, the less precise the momentum is known, according to Heisenberg's Uncertainty Principle. Particles 2 and 3 have more exact position because their wave functions are less spatially stretched, but they have less precise momentum.

The most exact momentum belongs to particle 1.

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