CHAPTER XV

WE SEND MESSAGES FROM THE STARS

The kind of messages referred to. How the electrons have informed

man of what the stars are made. How man reads the electrons'

wireless messages. How it is other electrons that enable man to

read the messages. The real explanation of reflection of light.

How light is absorbed by some objects. How some substances are

transparent. Why objects appear coloured. What makes the lines

in the spectra of stars. The spectroscope 144

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