7.11-12 Electromagnetic Waves

4. The ____________ radiation can be harmful to your skin and eyes when absorbed in strong intensity
5. Light is part of the _____________ waves
8. The vibrating atoms of a glowing bulb filament emit _________ and light
9. All atoms are made up of a central ________ with electrons orbiting around it
15. Ultraviolet radiation and Gamma rays can be used for ____________ medical equipment as it is able to kill germs
16. VHF and UHF radio waves are used for TV __________
17. Infrared waves are also used in ________ controllers of TV and DVD players
18. The radio waves with the shortest wavelength is also known as _____________
20. Microwaves produces a _________ effect when absorbed
22. Infrared waves are used for __________ alarms when detecting intruders in the dark
23. All EM waves transfer ____________
24. X-rays are dangerous as it can ionise cells to cause cancer or __________ of cells
25. Hotter objects emits infrared waves of _________ wavelengths

1. As objects get _________, it emits more and more infrared waves
2. Some materials glow and produce ____________ when they absorb ultraviolet radiation
3. An ____________ electric current emits radio waves (antenna)
6. Although X-rays and gamma rays are dangerous, concentrated beams of X-rays or gamma rays can be used to treat _________
7. All EM waves can travel through _________ or without a medium
10. The full range of the EM waves is called the electromagnetic ___________
11. __________ rays have the shortest wavelength
12. Light and other EM waves are all ___________ waves
13. The only visible part of the EM spectrum is _______
14. Long and medium waves are able to _________ around obstacles such as hills
19. UV rays, X-rays and Gamma rays cause ______________, the removal of electrons from atoms and produce ions
21. _______ waves has the longest wavelength