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As θ = 2λ/a, θ₀ = 2 × 6000/a ... (i). θ₁/θ₀ = λ₁/λ₀ ... (ii).

1. θ₀ = 2λ/a
2. θ₁ = λ₁/λ₀
3. θ₀ = 2 × 6000/a
4. θ₁/θ₀ = λ₁/λ₀

Correct answer: θ₁/θ₀ = λ₁/λ₀

Solution

The equation θ₁/θ₀ = λ₁/λ₀ is directly given in the problem statement as equation (ii), making option D correct.

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