I've had this thought for a long time and finally decided to ask if anybody else has thought the same. There are a lot of places on Earth where snow lies and doesn't melt under bright sun, because it has a very high refractive index. But, if it were greyer, it would melt and cease to exist. It occured to me that it is a lucky coincidence that for snow to exist, it must be white. Or is it not a coincidence, and snow couldn't be not white? Are my concerns valid or am I falling victim to some logical paradox?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.