Christmas Lights Xkcd. Both where christmas comics 5th time this happened. Merry christmas from xkcd.
Explanation edit each light in this christmas scene is represented by its electromagnetic spectrum which shows in a graphical form how much energy is radiated by each wavelength of light. This means you re free to copy and share these comics but not to sell them. This work is licensed under a creative commons attribution noncommercial 2 5 license.
Christmas lights alt text merry christmas from xkcd.
Christmas lights alt text merry christmas from xkcd. Xkcd phone 2 although it could be seen as a perfect gift for christmas christmas 2015. Christmas lights alt text merry christmas from xkcd. This means you re free to copy and share these comics but not to sell them.
