Name the physical quantities which are measured in the following unit
nm

Explanation

To solve the question of which physical quantity is measured in the unit nanometer (nm), we can follow these steps:

### Step 1: Understand the unit nanometer (nm)
- A nanometer is a unit of length. It is a metric unit that is commonly used to measure very small distances.

### Step 2: Convert nanometers to meters
- We know that 1 nanometer (nm) is equal to \(10^{-9}\) meters. This conversion helps us understand the scale of measurement.

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