Usage of "May" and "Might"?

[Joyjoy]

Does it mean something different in the following two sentences?

(1) You may fall down.
(2) You might fall down (I know in this sentence, "might" is not the past tense of "may."

I am confused about the usage of these two words:may & might. Please explain.

Thank you very much.

[Mister Micawber]

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Here the two words are essentially equivalent. 'Might' is a tentative form of 'may', so #2 makes it slightly less probable, perhaps.
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Native English teacher at Mister Micawber's

[Joyjoy]

Thank you. Even though I am still confused about the two words, but I really appreciate your answer very much. :)

[Mister Micawber]

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When they are used to mean 'possibility', Joy, they are essentially interchangeable.
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_________________
Native English teacher at Mister Micawber's