What is meso- scopic Physics?

Explanation

### Step-by-Step Solution:

1. **Definition of Mesoscopic Physics**:
Mesoscopic Physics is a branch of physics that studies systems that are intermediate in size between microscopic (atomic and molecular) and macroscopic (bulk) scales.

2. **Size Range**:
The size range of mesoscopic systems typically falls between 1 nanometer (nm) to 1000 nanometers (or 1 micron). This range includes structures that are larger than single atoms but smaller than bulk materials.

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