A proton is contained in an infinite one-dimensional box with a minimum kinetic energy of 7.9 MeV. The potential energy is zero inside the box Show the steps needed to determine the width of the box
A proton is contained in an infinite one-dimensional box with a minimum kinetic energy of 7.9 MeV. The potential energy is zero inside the box Show the steps needed to determine the width of the box
Related questions
Question
![**Problem Statement:**
A proton is contained in an infinite one-dimensional box with a minimum kinetic energy of 7.9 MeV. The potential energy is zero inside the box. Show the steps needed to determine the width of the box.
**Solution Steps:**
1. **Understanding the Quantum System:**
- The proton is confined in a one-dimensional infinite potential well.
- The eigenvalues of energy for a particle in such a box are given by:
\[ E_n = \frac{n^2 h^2}{8mL^2} \]
Where:
- \( n \) is the principal quantum number (n = 1, 2, 3, ...),
- \( h \) is Planck’s constant,
- \( m \) is the mass of the proton,
- \( L \) is the width of the box.
2. **Given Conditions:**
- Minimum kinetic energy \( E_1 = 7.9 \text{ MeV} \).
3. **Determine the Width of the Box:**
- Using the expression for energy, substitute \( E_1 = 7.9 \text{ MeV} \) and \( n = 1 \):
\[ 7.9 \times 10^6 \text{ eV} \times 1.6 \times 10^{-19} \text{ J/eV} = \frac{h^2}{8mL^2} \]
- Solve for \( L \):
\[ L = \sqrt{\frac{h^2}{8m \times 7.9 \times 1.6 \times 10^{-13}}} \]
- Use constants:
- \( h = 6.626 \times 10^{-34} \text{ J}\cdot\text{s} \),
- \( m = 1.673 \times 10^{-27} \text{ kg} \).
4. **Final Calculation:**
- Substitute the values for \( h \), \( m \), and the kinetic energy to calculate \( L \).
This calculation determines the width of the box necessary to achieve the given kinetic energy for the proton in an infinite potential well.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F590efbb4-bfa3-48e4-b7a4-ba8d0f00ec23%2F1224fb4f-3957-46e0-ba5f-1edf906c7eb9%2F9g8sgqe_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Problem Statement:**
A proton is contained in an infinite one-dimensional box with a minimum kinetic energy of 7.9 MeV. The potential energy is zero inside the box. Show the steps needed to determine the width of the box.
**Solution Steps:**
1. **Understanding the Quantum System:**
- The proton is confined in a one-dimensional infinite potential well.
- The eigenvalues of energy for a particle in such a box are given by:
\[ E_n = \frac{n^2 h^2}{8mL^2} \]
Where:
- \( n \) is the principal quantum number (n = 1, 2, 3, ...),
- \( h \) is Planck’s constant,
- \( m \) is the mass of the proton,
- \( L \) is the width of the box.
2. **Given Conditions:**
- Minimum kinetic energy \( E_1 = 7.9 \text{ MeV} \).
3. **Determine the Width of the Box:**
- Using the expression for energy, substitute \( E_1 = 7.9 \text{ MeV} \) and \( n = 1 \):
\[ 7.9 \times 10^6 \text{ eV} \times 1.6 \times 10^{-19} \text{ J/eV} = \frac{h^2}{8mL^2} \]
- Solve for \( L \):
\[ L = \sqrt{\frac{h^2}{8m \times 7.9 \times 1.6 \times 10^{-13}}} \]
- Use constants:
- \( h = 6.626 \times 10^{-34} \text{ J}\cdot\text{s} \),
- \( m = 1.673 \times 10^{-27} \text{ kg} \).
4. **Final Calculation:**
- Substitute the values for \( h \), \( m \), and the kinetic energy to calculate \( L \).
This calculation determines the width of the box necessary to achieve the given kinetic energy for the proton in an infinite potential well.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)