Open vs opened in English

The door is open or opened. Which word should be used after the linking verb? Many students don't know the difference and use it interchangeably.

Episode 10: Marc Weinberg, OpenBook: An English Dept. Podcast, Faculty, Department of English

🆚What is the difference between open and opened ? open vs opened ?

Opened old english book's pages blurred close-up background Stock Photo - Alamy

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Solved 3-33. The trunk of an automobile is opened in one of

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Opened old english book's pages blurred close-up background Stock Photo - Alamy

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