In a double slit experiment, the slit separation is 0.2 cm and the slit to screen distance is 100cm. Find the positions of the third order minima, if wavelength of the source is 500 nm.

Explanation

To solve the problem of finding the positions of the third order minima in a double slit experiment, we can follow these steps:

### Step 1: Understand the given parameters
- Slit separation (d) = 0.2 cm = 0.2 × 10^(-2) m = 2 × 10^(-3) m
- Slit to screen distance (D) = 100 cm = 1 m
- Wavelength of the source (λ) = 500 nm = 500 × 10^(-9) m = 5 × 10^(-7) m

### Step 2: Use the formula for the position of minima
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