1. Waves of the Electromagnet Spectrum

2. How do Electromagnet waves compare?
All travel at same speeds in vacuum
Have different wavelengths and frequencies
Visible light is only range of wavelengths you can see

3. What makes up the electromagnet spectrum
Radio waves
Microwaves
Infrared rays
Visible light
Ultraviolet rays
X-rays
Gamma rays

4. Radio Waves Longest wavelength and lowest frequency
Used to broadcast radio programs
Electrical signals are converted to sounds

5. Microwaves
Have shorter wavelengths and higher frequencies than radio waves
Uses include RADAR and cellular phone communications

6. Infrared Rays
Have shorter wavelengths and higher frequencies than microwaves
Uses include heat bulbs to get items warm
Warmer objects give off infrared waves with more energy and higher frequencies

7. Visible light Electromagnet waves that you can see
Make up only a small part of the electromagnet spectrum
Have shorter wavelengths and higher frequencies than infrared rays

8. Ultraviolet waves
Wavelengths shorter and frequencies higher than visible light
Can damage or kill living cells
Causes sunburn when skin is overexposed and unprotected
Small doses can be helpful in production of vitamin D

9. X-rays Wavelength shorter and frequency higher than ultraviolet rays
X-rays can penetrate most matter
Dense matter absorbs x-rays
Used in industry and medicine

10. Gamma Rays Shortest wavelengths and highest frequencies
Most penetrating electromagnet wave
Used to examine body’s internal structures by infection of fluids that exert gamma rays
Gamma Rays are absorbed by the Earth’s atmosphere