# Peculiar phenomenon in tea made in a microwave - what is it?

**URL:** <https://boards.straightdope.com/t/peculiar-phenomenon-in-tea-made-in-a-microwave-what-is-it/1011929>\
**Category:** Factual Questions\
**Created:** [December 20, 2024, 4:31pm UTC](https://boards.straightdope.com/t/peculiar-phenomenon-in-tea-made-in-a-microwave-what-is-it/1011929 "2024-12-20T16:31:19Z")\
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**Author:** ![DPRK](https://avatars.discourse-cdn.com/v4/letter/d/4491bb/32.png) [@DPRK](https://boards.straightdope.com/u/DPRK)\
**Post date:** [December 20, 2024, 6:54pm UTC](https://boards.straightdope.com/t/peculiar-phenomenon-in-tea-made-in-a-microwave-what-is-it/1011929/2 "2024-12-20T18:54:16Z")

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Patterns like that, for example in a cup of coffee with cream added to it, can be a result of vortices in the circulating fluid.

However, how are you preparing your tea so that a bunch of foam is extracted?? Or are we talking about only a few bubbles? Perhaps we need to merge this topic into this thread: [What's wrong with using a microwave to make tea?](https://boards.straightdope.com/t/whats-wrong-with-using-a-microwave-to-make-tea/1011513)

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