Heisenberg uncertainty principle is not valid for :

Options

A. (1) Moving electron
B. (2) Motor car
C. (3) Stationary particles
D. (4) Both (2) and (3)

Explanation

To determine the answer to the question "Heisenberg uncertainty principle is not valid for:", we need to analyze the options provided and understand the principle itself.

### Step-by-Step Solution:

1. **Understand the Heisenberg Uncertainty Principle**:
- The Heisenberg Uncertainty Principle states that it is impossible to simultaneously know both the position (Δx) and momentum (Δp) of a microscopic particle with perfect accuracy. The relationship is given by the equation:
\[ Δx \cdot Δp \geq \frac{h}{4\pi} \]
- Here, \(h\) is Planck's constant.

2. **Identify the Types of Particles**:
- The principle is primarily applicable to microscopic particles such as electrons, protons, and atoms. It does not apply to macroscopic objects.

3. **Evaluate the Options**:
- **Option 1: Moving electron**: This is a microscopic particle, so the Heisenberg Uncertainty Principle is valid here.
- **Option 2: Motor car**: This is a macroscopic object. The principle does not apply to macroscopic objects.
- **Option 3: Stationary particles**: Stationary particles are not moving, and the principle is not valid for objects at rest.
- **Option 4: Both 2 and 3**: This option combines the previous two, indicating that the principle is not valid for both a motor car and stationary particles.

4. **Conclusion**:
- Since the Heisenberg Uncertainty Principle is not valid for macroscopic objects (like a motor car) and stationary particles, the correct answer is **Option 4: Both 2 and 3**.

### Final Answer:
The Heisenberg Uncertainty Principle is not valid for **both a motor car and stationary particles** (Option 4).

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