"Classical Physics" deals with

Options

A. Macroscopic phenomena
B. Mesoscopic phenomena
C. Microscopic phenomena
D. Sometimes mesoscopic sometimes microscopic

Answer

To solve the question "Classical Physics deals with," we need to analyze the provided options and understand the scope of classical physics.

### Step-by-Step Solution:

1. **Understanding Classical Physics**:
- Classical physics is a branch of physics that deals with the laws of motion, forces, energy, and the behavior of matter on a large scale. It includes mechanics, thermodynamics, electromagnetism, and optics.

2. **Analyzing the Options**:
- **Option 1: Macroscopic phenomena**: This refers to phenomena that can be observed directly without the need for a microscope. Classical physics primarily deals with macroscopic phenomena.
- **Option 2: Mesoscopic phenomena**: This refers to phenomena that occur at a scale between microscopic and macroscopic, often involving small groups of atoms or molecules.
- **Option 3: Microscopic phenomena**: This refers to phenomena at the atomic or subatomic level, which is typically the realm of quantum mechanics rather than classical physics.
- **Option 4: Sometimes mesoscopic sometimes microscopic**: This option suggests a mix of scales, which does not accurately represent the primary focus of classical physics.

3. **Identifying the Correct Option**:
- Given that classical physics primarily deals with macroscopic phenomena, the correct answer is **Option 1: Macroscopic phenomena**.

4. **Conclusion**:
- Therefore, classical physics deals with macroscopic phenomena, which includes the study of mechanics, thermodynamics, optics, and electromagnetism.

### Final Answer:
Classical Physics deals with **macroscopic phenomena**.