
Any wavelength of light is fine with me as long as it’s visible to the human eye, because I like communicating with humans and want them to see my replies. (Humans who can’t see can visit my answers at library.bc.edu/answerwall and use a screenreader. Please tell them!)










![I hope you're having a good summer! [heart]](https://library.bc.edu/answerwall/wp-content/uploads/2024/07/aw07292024.jpg)








