ELECTROMAGENTIC WAVES

3. Used for voice communications and broadcasts.
4. Continuous range of electromagnetic waves arranged in order of frequency or wavelength.
6. RADAR stands for _______.
7. One of the uses of microwaves that is used for navigation and mapping.
12. Visible light with the longest wavelength.
16. He discovered infrared.
17. Major source of UV radiation.
19. Other term for x-ray.
20. Used to destroy cancer cells.
21. He discovered ultraviolet radiation.
22. (True/False) Ultraviolet is called as such because its frequency is lower than violet light
23. Process in which an antenna converts electric current to radio waves.
24. Used to assess and monitor the progress of breast cancer treatment.
25. Type of EM wave used in forensic investigation.

1. He discovered the EM wave with the lowest frequency but with the longest wavelength.
2. He discovered the electromagnetic wave that has unknown nature and origin.
5. Used in viewing internal parts of the body without invasive exploratory surgery.
8. He discovered the electromagnetic wave with the highest frequency.
9. He discovered EM wave that is used in night vision system.
10. Uses the heat of microwave to shrink and destroy tumors.
11. Type of modulation used in music and entertainment.
13. Converts electrical signals into radio signals and vice versa.
14. Phenomenon where substances absorb UV radiation and emit visible light.
15. Commonly used in reading contents of an optical disk.
18. Process in which an antenna converts electric current to radio waves.