1. Electromagnetic Spectrum

2. What are some examples of waves around us?
Sunlight
Radio
Infrared
Visible light
Ultra Violet
Television
X-rays
Gamma Rays
Ocean

3. How fast are these waves?
300,000,000 meters in one second.
Light from the sun reaches the earth in 8 minutes.

4. Light is a wave and it’s not a wave…
There are times when it is easier to understand light as a stream of particles or a RAY

5. What is polarized light?
When light goes through a filter eliminating some of the waves

6. What two things do all waves have in common?
They transfer energy from place to place
They require a medium

7. What are electromagnetic waves?
Transverse waves that have some electrical and some magnetic properties.

8. What is a medium?
A material through which a wave can travel

9. Why are electromagnetic waves so special?
They consist of changing electrical and magnetic fields

10. What does transverse mean?
A wave that vibrates the medium perpendicular to the direction of the wave.

11. What is the electromagnetic spectrum?
Name for the range of electromagnetic wave placed in order of increasing frequency

12. List all of the waves on the spectrum
Radio
Infrared
Visible light
X Rays
Gamma Rays

13. Which of these can you see?
Only visible light
Why can’t you see the others?
The waves are moving either too fast or too slow for your eyes to pick them up.

14. Look at Figure 5, what do you notice about wavelength and frequency?
They are opposites.
When the wavelength gets bigger, the frequency gets lower….

15. Picture Time!!

16. Picture Time!!

17. Picture Time!!