Find the angular divergence in which most of the light is diffracted if a parallel beam of monochromatic light of wavelength 500 nm passes through a long slit of width 0.3 mm.

Explanation

To find the angular divergence in which most of the light is diffracted when a parallel beam of monochromatic light passes through a long slit, we can follow these steps:

### Step 1: Understand the Problem
We need to find the angular divergence (2θ) in which most of the light is diffracted when light of wavelength (λ) 500 nm passes through a slit of width (b) 0.3 mm.

### Step 2: Identify the Formula
The angle θ for the first minimum in a single-slit diffraction pattern is given by:
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