9ABD

1. - Number of wave cycles per second.
5. - The basic unit of matter, central to quantum studies.
8. - Field that may use quantum encryption to protect data.
12. - Unique patterns of light produced by atoms when electrons drop energy levels.
13. - When a quantum system exists in multiple states at once.
14. - Branch of physics that explains the behavior of particles on a small scale.
16. - Distance between two consecutive wave peaks.
17. - Common display type that relies on polarized light.
18. - Electromagnetic radiation that can behave like both a wave and a particle.

2. - Quantum link between particles no matter how far apart.
3. - Required to excite electrons or eject them from metal surfaces.
4. - Electrons are ejected when light hits a surface in this quantum phenomenon.
6. - General term for strange behavior at the atomic and subatomic levels.
7. - Heisenberg’s rule: you can’t know both position and momentum precisely.
9. - Includes reflection, refraction, diffraction, and interference.
10. - A particle of light with no mass, just energy.
11. - What happens to electrons in the photoelectric effect.
15. - Light can act as both a wave and a particle.
16. - Describes the direction of oscillation in a transverse wave.