"5-3 Light and EM Spectrum": HTML5 Crossword

Across

3. EM waves that have the shortest wavelengths, the highest frequencies, and the highest energies (5,4)
4. three colors of light (RGB) which can be mixed to produce all possible colors by color addition (7,6)
5. A space where no particles of matter exist (6)
6. the part of the EM spectrum that is just above the frequency of violet light (11)
8. Energy that moves in the form of EM waves (9)
9. A form of energy that can travel through space. (15)
11. The emission of electrons from a metal when light shines on the metal (13,6)
12. three colors of substances (CMY) which can be mixed to produce all possible colors by color subtraction (7,8)
13. Determined by wavelength/frequency of the electromagnetic radiation (5)
14. Determined by the intensity of the electromagnetic radiation (10)
15. The range of all EM frequencies (2,8)
16. the part of the EM spectrum that is just below the frequency of red light (8)
17. EM waves that are used in radar and cell phones (10)
18. the part of the EM spectrum that human eyes can see (7)

Down

1. A wave that moves the medium in a direction perpendicular to the direction in which the wave travels (10)
2. electrons and light can behave as both a wave and a particle (7,2,5)
7. EM waves that have the longest wavelengths, the lowest frequencies, and the lowest energies (5,5)
10. a disturbance that transfers energy through a field and does not require a medium (15,4)
12. a particle of light ("packets of energy") (6)