How do glow sticks work?
This question was asked by Aston from West Sussex, UK. Glow sticks are a great favourite around this time of…
Tag: light
Why does the night sky look black when there are so many stars?
This question was asked by Flora in London, UK. This is a fantastic question and it’s one that has puzzled…
Why is the sea blue when water is clear?
This question was asked by Cat from Dundee, UK. If you look at a glass of water, it’s pretty obvious…