Reflection

Dr Chin Lee told Kate Stewart that her mother said that evil did not like its own reflection. (AUDIO: ) This was indeed the case with the Mara. (TV: ; AUDIO: )
By 2007, a poster in a classroom at Deffry Vale High School referenced, among other things, reflection. (TV: )
The female Saturnyns hid themselves on Earth using perception filters. However, this technology did not hide their reflections. Since brains could not process the two conflicting pieces of information, they had no reflections in mirrors. (TV: )
Soon after regenerating, the newly-born Second Doctor briefly saw his preceding incarnation in his reflection, (TV: ) due to a quirk of Gallifreyan optics. (AUDIO: )
During the Siege of Trenzalore, the Eleventh Doctor trapped a Weeping Angel by forcing it to look at its own reflection. (TV: )
When the First Doctor, Susan Foreman and Stoyn met the Archaeons, they initially mistook the creatures' globular surface for a reflection only to understand that they creatures were communicating with the Time Lords using their own images. The First Propagator subsequently adopted Stoyn's reflection to communicate with the Time Lords. (AUDIO: )
In 2017, Heather discovered a puddle of sentient oil, quickly deducing it was not an ordinary puddle due to her reflection not being horizontally reversed. (TV: )
Category:Physics from the real world
Category:Geometry from the real world