A beam of light of wavelength 600 nm from a distant source
falls on a single slit 1.0 mm wide and the resulting diffraction pattern is
observed on a screen 2m away. What is the distance between the first dark
fringe on either side of the central bright fringe?

Explanation

To solve the problem of finding the distance between the first dark fringe on either side of the central bright fringe in a single-slit diffraction pattern, we can follow these steps:

### Step 1: Identify the given values
- Wavelength of light, \( \lambda = 600 \, \text{nm} = 600 \times 10^{-9} \, \text{m} \)
- Width of the slit, \( b = 1.0 \, \text{mm} = 1.0 \times 10^{-3} \, \text{m} \)
- Distance from the slit to the screen, \( D = 2 \, \text{m} \)

### Step 2: Use the formula for the position of dark fringes
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