Why & How do I see this heart-shaped cardioid formed in my cup?, by Shouryaveer Mehta, The Startup

Ok, first of all if you don’t know what I’m talking about, I’m talking about this shape in a cup of tea/coffee (or even water). I first got curious about this weird shape appearing in my cup a few…

optics - Why would the reflection of a lamp by a bowl look like a heart? - Physics Stack Exchange

Heart Curve -- from Wolfram MathWorld

The Equation of the Heart, Derived from the Ellipse

Cardioid and its equation in polar form

I Heart Cardioids – David Richeson: Division by Zero

All stories published by The Startup on February 06, 2020 – Medium

How to draw a heart shaped figure

I Heart Cardioids – David Richeson: Division by Zero

Cardioid Visualization, Heart-shape formed by the chords of a circle

calculus - Cardioid in coffee mug? - Mathematics Stack Exchange

Optics: Why does a heart shape sometimes form in a coffee mug? - Quora

calculus - Cardioid in coffee mug? - Mathematics Stack Exchange