Why? (mirror reflections)

[Darren Dirt]

http://xkcd.com/1145/

the ALT text, it hurt my brain. is it a trick question, maybe in the way it is formed? Or is it really a good question to ponder? again, refer to earlier statement about brain and hurt.

[Thorin]

The sky is blue due to the Tyndall effect / Rayleigh scattering joined with the way our eyes perceive colour: http://math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html (this was something I knew already, so just googled "Tyndall blue sky")

Mirrors don't flip images, people do: http://physics.stackexchange.com/questions/8227/a-mirror-flips-left-and-right-but-not-up-and-down (this was something I thought I understood but had to double-check so googled "why is text not upside down in mirrors").  It's not a trick question, it just illustrates the common misconception that people have about mirrors.

[Darren Dirt]

Mirrors don't flip images, people do: http://physics.stackexchange.com/questions/8227/a-mirror-flips-left-and-right-but-not-up-and-down (this was something I thought I understood but had to double-check so googled "why is text not upside down in mirrors").  It's not a trick question, it just illustrates the common misconception that people have about mirrors.

I guess this kind of helpful suggestion-question ... helps: "On which plane are your (2) eyes oriented?" ... and the "Two-Face" example gets you to the realization "left and right haven't been flipped so much as forward and backward".