History of Light

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Across
  1. 4. Device used to measure the spectrum of light produced by a source.
  2. 6. Provided an equation which predicted the wavelength of hydrogen's entire spectrum.
  3. 8. Expanded on the wave theory of light because he thought the corpuscular theory at the time was insufficient.
  4. 9. Aristotle disagreed with Empedocles, stating the speed of light must be _________.
  5. 10. The double-slit experiment produced a _______ pattern, demonstrating light experienced interference.
  6. 12. First person to apply geometric reasoning to optics.
  7. 14. First proved the speed of light was finite while trying to develop a clock.
  8. 16. First proposed the emission theory of vision.
  9. 18. First proposed that light travels through air in pressure waves like sound.
  10. 20. Provided an equation which predicted the wavelength of hydrogen's visible spectrum.
  11. 21. Invented the spectroscope.
  12. 23. The luminous _____ was thought to be the medium light traveled through.
  13. 25. The effect produced by the Earth's motion relative to the luminous ether.
  14. 26. Mathematically proved that electricity and magnetism were waves that traveled at the speed of light.
Down
  1. 1. The effect observed by Hertz where UV light allowed charged particles to be ejected more easily.
  2. 2. The theory of vision that states light enters the eyes.
  3. 3. Performed the double-slit experiment, proving light is a wave.
  4. 4. Kirchoff and Bunsen heated samples of pure hydrogen an were the first to observe their _________.
  5. 5. Wrote the corpuscular theory that inspired Newton's version.
  6. 7. Maxwell showed mathematically that the speed of light was the same in all __________.
  7. 9. The device used by Michelson and Morley to try and measure the ether.
  8. 11. Islamic scholar who wrote a book on optics where he first stated the law of reflection.
  9. 13. The Roman poet Lucretius believed vision occurred as objects shed their ________.
  10. 15. Proposed the version of corpuscular theory that dominated for over 100 years.
  11. 17. Performed a series of experiments demonstrating the wave nature of electromagnetism.
  12. 19. First proposed a relationship between electricity, magnetism, and light based on his experimental results.
  13. 22. First observed the refraction of light in the Earth's atmosphere.
  14. 24. Developed much of the mathematics which explained the wave theory of light.