The nephroid: the curve in your coffee cup

A nephroid is a type of curve often seen on the surface of a cup of coffee in the sunshine – a crescent of light formed by sunlight reflecting off the inside of the cup onto the surface of the drink.

My other YouTube channels:
The Science Fiction Rock Experience ( the music show I produce):
@sciencefictionrockexperience
My science and music channel::
@drdaviddarling
Science World (with Emrah Polat):
@scienceworld1

My website: https://www.daviddarling.info
My latest book is available here: https://oneworld-publications.com/wor...

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