POST ASSESSMENT:
I. Write the type of electromagnetic wave used in each application.
1. Radars -
2. television transmission -
3. AM and FM broadcasting -
4. car locking systems -
5. Bluetooth speakers -

II. Choose and encircle the letter of the best answer.
1. What type of waves used by authorities to test the speed of your vehicle with RADAR? A. infrared B. radio C. ultraviolet D. visible light

2. Your day starts by tuning in to your favorite FM radio station, hearing great music lightens up your mood. Which EM wave used in broadcasting the program? A. Ultraviolet B. radio C. microwave D. infrared

3. What type of EM wave used to take images of the Earth’s terrain map? A. infrared B. microwave C. radio D. ultraviolet

4. Which among the EM radiation is used in GPS or global positioning system? A. ultraviolet B. microwave C. visible light D. infrared

5. What type of electromagnetic wave is used to cook food, predict the weather, and for communications? A. radio B. microwave C. infrared D. ultraviolet

6. Which waves are used to show heat loss with heat sensitive cameras? A. infrared B. microwave C. radio D. visible light

7. Which among the following wave is not employed in case of remote sensing? A. X-ray B. Visible ray C. Thermal IR D. Radio waves

8. Optical mechanical scanner is used in which type of electromagnetic waves? A. Light waves B. Radio waves C. Thermal IR D. X-rays

9. Which of the following indicates the correct set of combination of characteristics in radio wave? A. Shorter wavelength – high frequency B. Longer wavelength – less frequency C. Shorter wavelength – less frequency D. Longer wavelength – high frequency

10.Which one of the following is NOT a source of infrared radiation? A. Human bodies B. Light bulbs C. Sun D. Books​