The interference pattern is observed at P due to the superposition of two rays coming out from a source S as shown in the diagram. The value of l for which maxima is obtained at P is, (Given that R is a perfect reflecting surface)

Question

The interference pattern is observed at P due to the superposition of two rays coming out from a source S as shown in the diagram. The value of l for which maxima is obtained at P is, (Given that R is a perfect reflecting surface), l ⁡ = 2 n λ 3 - 1, l ⁡ = 2 n - 1 λ 3 4 2 - 3, l ⁡ = 2 n - 1 λ 3 - 1, l ⁡ = 2 n - 1 λ 2 3 - 1

MARKS App · Accepted Answer

Δ x = 4 l 3 + λ 2 - 2 l = n λ for construction interference. λ 2 is added due to reflection from denser medium. ⇒ l = n λ - λ 2 4 3 - 2 = 3 2 n - 1 λ 4 2 - 3

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