Waves

2. The range of frequencies of electromagnetic radiation, from low-frequency radio waves to high-frequency gamma rays.
6. A type of high-energy electromagnetic radiation that is often used for medical imaging.
8. The range of electromagnetic radiation that is visible to the human eye.
10. A type of electromagnetic radiation that has longer wavelengths than microwaves and is often used for communication.
13. The distance between two corresponding points on a wave.
15. A type of radiation that can travel through a vacuum and includes light, radio waves, and X-rays.
17. The highest point of a wave.
18. A type of high-energy electromagnetic radiation that is produced by radioactive decay or nuclear reactions.
20. The amount of time it takes for one complete wave to pass a point.

1. A type of wave in which the vibrations are parallel to the direction of the wave's motion.
3. The substance through which a wave travels.
4. A type of electromagnetic radiation that has shorter wavelengths than visible light and can be harmful to living organisms.
5. The number of waves that pass a point in a given amount of time.
7. The height of a wave from its resting position.
9. The lowest point of a wave.
11. A type of wave in which the vibrations are perpendicular to the direction of the wave's motion.
12. A type of electromagnetic radiation that is visible to the human eye.
14. A type of longitudinal wave that can travel through solids, liquids, and gases and is created by vibrations.
16. A type of electromagnetic radiation that has longer wavelengths than visible light and can be felt as heat.
19. A type of electromagnetic radiation that has shorter wavelengths than radio waves and is often used for communication and cooking.