Energy

2. wave from the portion of the electromagnetic spectrum at lower frequencies than microwaves
6. lowest energy state of an atom or other particle
9. state of a physical system that is higher in energy than the ground state
10. the ability to do work
13. number of waves that pass a fixed point in unit time
14. particle representing a quantum of light or other electromagnetic radiation
16. the smallest discrete unit of an phenomenon
17. function describing the location and wave-like behavior of an electron in an atom
18. a periodic disturbance that moves through space
19. maximum displacement or distance moved by a point on a vibrating body or wave
20. an electromagnetic wave with a wavelength in the range 0.001-3m. used in radar for communications

1. natural agent that makes things visible
3. the pattern of lines passing through a prism to separate it into the different frequencies of light it contains
4. energy level defined by the quantum theory
5. fundamental physical constant of a foundational importance in quantum mechanics (E=hf)
7. phenomenon where electrically charged particles are released from or within a material when it absorbs electromagnetic radiation
8. the distance between identical points (crests) in the adjacent cycles of a wave form
11. negatively charged particle of the atom
12. the range of all types of electromagetic radiation
15. the segment of the electromagnetic spectrum that the human eye can see