Light fantastic -- Now you see it, now you don't -- The green planet and the red heat -- Hot rays -- Ultraviolet brings the blues -- Danger beyond the violet -- Energy rhythms -- The exploding sun -- No soap -- Turning on and tuning in -- The speed that destroyed space and time -- Microwaves everywhere -- The man with the X-ray vision -- Röntgen rays for everyone -- What's in your basement? -- The atomic quartet -- Gamma rays : the impossible light -- Cell-phone radiation -- Cosmic rays -- Beams from the universe's birth -- Energy from our minds -- Ray guns -- The next frontier : zero-point and dark energies -- Total solar eclipse : when the rays stop -- ETs may be broadcasting, but what's their number? -- Does light have a bright future?