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Would these be constructive/ destructive interferences? 1. Green light (λ = 500 nm) is perpendicularly incident...

Would these be constructive/ destructive interferences?

1. Green light (λ = 500 nm) is perpendicularly incident on surface of oil ( n=1.5 and thickness= 333 nm) floating in air. Viewed from air.

2. Green light (λ = 500 nm) is perpendicularly incident on surface of oil ( n=1.2 and thickness= 207 nm) floating on glass (n=1.53). Viewed from air.

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