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curiosamathematica:

Have you ever noticed the refraction of light in a cup of coffee?

The envelope of light rays reflected or refracted by a curved surface is called a caustic (from the Latin causticus, “burning”); more concrete a catacaustic in case of reflection, and a diacaustic in case of refraction. The caustic is a curve or surface to which each of the light rays is tangent. In case of a circle, the resulting shape is a cardioid.

Wolfram MathWorld provides a list of famous catacaustics.
Rainbows are familiar examples of caustics as well!

asylum-art:

Kamoplan Chotvichai: Hand- cut paper, Self portraits Photographs

Digital C-Print and Hand cut paper; 2013/2014

Kamolpan Chotvichai was born in 1986 in Bangkok where she currently resides and works. She received her MFA at Silpakorn university ,Bangkok and has since been awarded numerous art prizes and scholarships. She challenges the limitations of paper in her artwork through the use of simple tools. One of her repertoires is the application of certain cutting techniques to dissolve her own image that is printed on paper. Based on the Buddha’s teaching on anatta(no self).

One’s adhering to something can cause the greatest misery in life especially being attached to self-existing. The idea of this self-existing is actually self-formed and leads to variety of emotions. The temper, the mind and the body altogether gradually form the idea of being alive but when putting into consideration, without any substance, it is merely the thought that we think we are existing.

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