When I was young I was reading a book about physics. The book had a white cover with green text. The information in the book was partly that if you shoot an arrow from the back a train then that will be an example of a relative motion. In particular I am certain that the book mentioned a poem which was in style
If I could dye me whyskers green so that they could not be seen ..
I'm also quite certain that there was an example of physics described in the same book, describing two lightbulbs which are emitting light next to each other inside a closed box with the question if the reader thinks that any shadow will appear on the inside on the box. The book also described the Michelson-Morley experiment if I remember correctly. Is there any way for me to get more information about the memory I have?