Light of wavelength `600 nm` is incident normally on a slit of width `3 mm`. Calculate linear width of central maximum on a screen kept `3 m` away from the slit.

Explanation

To solve the problem of calculating the linear width of the central maximum on a screen due to diffraction through a single slit, we will follow these steps:

### Step 1: Understand the given values
- Wavelength of light, \( \lambda = 600 \, \text{nm} = 600 \times 10^{-9} \, \text{m} = 6 \times 10^{-7} \, \text{m} \)
- Width of the slit, \( a = 3 \, \text{mm} = 3 \times 10^{-3} \, \text{m} \)
- Distance from the slit to the screen, \( D = 3 \, \text{m} \)

### Step 2: Use the formula for the linear width of the central maximum
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