Question

which of the following does not show any interference pattern​

Answer 1

Answer:

An excessively thin film shows no interference pattern because in that case, as the thickness of the film is negligible, the path difference, Δ, between the two reflected rays turns out to be λ/2 which is the condition of minima.

Explanation:

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Answer 2

Answer:

Excessively thin film

Explanation:

An excessively thin film shows no interference pattern because in that case, as the thickness of the film is negligible, the path difference, Δ, between the two reflected rays turns out to be λ/2 which is the condition of minima. Hence, the pattern is not observed.

The interference pattern is observed in the soap bubble, thick film, and wedge-shaped film.