17. What is the disappearance of an EM wave into a medium?1. Define Electromagnetic Wave (EM) 18. How are materials that allow most of the light that strikes to pass through classified?2. How do EM Waves form? 19. How are materials that transmit some of the light, but also causes some light to spread out in all directions3. What is the Source of most EM waves in Earths classified?environment? 20. How are materials that do not allow any light to pass4. What is the transfer of energy in the form of EM waves through them, because they reflect and/or absorb lightcalled? classified?5. What is the speed that EM Waves travel in a vacuum? 21. What is a way of filtering light so that all of its waves vibrate in the same direction?6. What is another name for the constant speed of EM wavesin a vacuum? List the colors that make up visible light in order 22.7. What is the electromagnetic spectrum? 23. 24.List the different waves in the electromagnetic spectrum in 25.order from longest to shortest. 26. 8. 27. 9. 28. 10. 29. 11. 30. What is the production of light by materials at high 12. temperatures called? 13. 14. 31. What is the production of light by living organisms called?15. Which type of EM waves is the most harmful to humans? 32. What is light that occurs when a material absorbs EM16. What is the passage of an EM wave through a medium? radiation of one wavelength and gives off EM radiation of a different wavelength?