1. The Properties of Light
By: Ciera Evans
Block 7

2. The Electromagnetic Spectrum
The electromagnetic spectrum consists of 7 different types of light waves.
-Radio Waves
-Microwaves
-Infrared
-Visible Light
-Ultraviolet
-X Rays
-Gamma Rays

3. Radio Waves The longest wavelengths Lowest frequency Lowest energy
Carries signals to radios and televisions
AM: Amplitude Modulation (Longest Wavelength)
Bounces off Ionosphere
FM: Frequency Modulation

4. Microwaves Higher frequency than radio waves.
Higher energy than radio waves.
Smaller wavelength than radio waves
Used for radars, cell phones
Used to heat up food.

5. Infrared Waves Has energy that is just below visible light.
“Infra” means below
Given off by stars, lamps, fire, etc.
You can feel infrared radiation as warmth on your skin.
Used for remote controls.

6. Visible Light The only part of the EM spectrum that we can see.
Contains seven different colors.
Red
Orange
Yellow
Green
Blue
Indigo
Violet

7. Ultraviolet Waves Found after violet in visible light.
Effective in killing bacteria and viruses
Overexposure can cause skin cancer and sunburn.
Can kill plants if they are overexposed also.
Sunblock protects your skin from harmful UV rays.

8. X- Rays Used in hospitals to find complications in bones.
Soft body tissue is transparent to the waves.
Bones block the rays.
Overexposure to x-rays can cause cancer.
Can also cause the reduction of blood.

9. Gamma Rays Used to treat certain cancers and tumors.
Could also cause cancers as a disadvantage.
Detects brain and cardiovascular abnormalities.
Used to kill pesticides and bugs.

10. Bibliography