Crossword Lab

3. waves: High-frequency waves that are "modulated" or changed so they can transport radio or TV signals.
6. The "projection screen" at the back of the eye where images form before being sent to the brain.
8. light: A light source using mercury vapor and a special coating to produce visible light more efficiently than heat-based bulbs.
12. Waves used for long-range communication and for vibrating water molecules to quickly heat up food.
14. A device producing a narrow, intense beam of light with synchronized waves; the name is an acronym.
15. signal: Information translated into a series of 1s and 0s, providing a reliable way to send data via computers.
17. A material property that allows light to pass through freely without scattering it.
18. This describes materials like clear glass that allow light to pass through so objects behind them are clearly seen.
19. The dark opening in the center of the eye that dilates or shrinks to regulate the amount of light entering.
20. Photoreceptor cells that help with vision in dim light and motion detection, but cannot perceive color.

1. A material that changes the color of reflected light by absorbing specific wavelengths.
2. rays: The highest-energy waves on the spectrum, often produced by radioactive atoms or cosmic events.
4. signal: Information represented as a continuous, varying wave, similar to the grooves on a vinyl record.
5. Specialized cells in the eye that work best in bright light and allow the world to be seen in vivid color.
7. Light: Light where every single wave is "in step" with the others, maintaining the same frequency and phase.
9. The clear, curved structure behind the pupil that bends light to focus it perfectly on the back of the eye.
10. This spectrum includes everything from the radio waves in a car to the visible light detected by eyes.
11. High-energy waves that pass through soft tissue, allowing doctors to check for broken bones.
13. violet waves: Waves from the sun that can cause sunburns or be used to kill bacteria and sterilize equipment.
16. The colored part of the eye that acts like a shutter to control the diameter of the pupil.