1. What do the following three items have in common?
Warm-up Exercise
What do the following three items have in common?
A zipper
A shark
A comb

2. What do the following three items have in common?
Warm-up Exercise
What do the following three items have in common?
A river
A person
A cave

3. What do the following three items have in common?
Warm-up Exercise
What do the following three items have in common?
A potato
A hurricane
A target

4. What do the following three items have in common?
Warm-up Exercise
What do the following three items have in common?
Restaurant customer
A bird
The Senate

5. EQ: What are the Characteristics of Electromagnetic Waves?

6. Electromagnetic Radiation
Characteristics of
Electromagnetic Radiation
A. Produced by the motion of electrically charged particles moving back and forth.

7. Electromagnetic Radiaiton
Characteristics of
Electromagnetic Radiaiton
The charged particles are surrounded by:
Electric fields
Magnetic fields

8. Electromagnetic Radiaiton
Characteristics of
Electromagnetic Radiaiton
Transverse waves
Do not require a medium

9. Electromagnetic Radiaiton
Characteristics of
Electromagnetic Radiaiton
d. All electromagnetic waves travel at 300,000,000 m/s in a vacuum
Nothing travels faster than the speed of light!

10. Electromagnetic Radiaiton
Characteristics of
Electromagnetic Radiaiton
e. Travels slower when passing through a medium

11. Electromagnetic Radiation
Duel Nature of
Electromagnetic Radiation
Particle nature
Travels in bundles of energy
Bundles act like small particles
Called photons

12. Electromagnetic Radiation
Duel Nature of
Electromagnetic Radiation

13. Electromagnetic Radiation
Duel Nature of
Electromagnetic Radiation
Wave nature
All electromagnetic waves travel at the same speed
Frequency and wavelength are used to classify the waves in the electromagnetic spectrum

14. Electromagnetic Spectrum
The electromagnetic spectrum is the complete range of electromagnetic waves placed in order of increasing frequency.

15. Electromagnetic Spectrum

16. Electromagnetic Spectrum

17. Create your own Mnemonic device to remember the Waves of the EM Spectrum
Radio
Microwave
Infrared
Visible Light
Ultraviolet
X-rays
Gamma Rays

18. Rotten Milk Is Very Undrinkable; X-tinguishes Gas

19. As the frequency increases: Wavelength decreases
Electromagnetic Spectrum
As the frequency increases:
Wavelength decreases
Photon penetrating energy increases

20. Radio Waves
Uses: Communication (telephones, , radio transmission, global positioning system (GPS)
Long wavelength and Low frequency
Lowest Photon energy

21. Radio Waves

22. Microwaves Uses: Cooking, cellular phones, radar
Long wavelength and Low frequency
Lower Photon energy

23. Infrared Radiation
Wavelength is only a little longer than visible light
Uses – Remote controls, thermal energy transfer (radiant energy) including night vision, infrared photography, locating tumors
(Remember all living object give off infrared radiation.)

24. Infrared Radiation

25. Visible Radiation
Only wavelengths that can be detected by the human eye
Use – allow humans to see

26. Ultraviolet Radiation
Higher frequency and shorter wavelength than visible radiation
Uses– Produces vitamin D in human skin and can be used to kill bacteria and viruses (sterilize equipment)
Warning! – too much can cause skin cancer; Ozone in the atmosphere blocks it

27. X-rays Higher frequency and photon energy – greater penetrating power
Uses: X-ray pictures; rays will penetrate soft matter like skin and muscle, but it is absorbed by the harder bones

28. Gamma Rays Highest frequency -- greater penetrating power
Uses: destroy human cells and can be used to kill cancerous cells

29. Concept Map

33. Pop Tart Review
Get ready!

34. What produces electromagnetic radiation?
Pop Tart Review
What produces electromagnetic radiation?

35. What type of wave is electromagnetic radiation?
Pop Tart Review
What type of wave is electromagnetic radiation?

36. Name a wave that can travel faster than electromagnetic radiation?
Pop Tart Review
Name a wave that can travel faster than electromagnetic radiation?

37. Pop Tart Review
What is a photon?

38. Name the longest electromagnetic wave.
Pop Tart Review
Name the longest electromagnetic wave.

39. Pop Tart Review
What name do we give to all the electromagnetic waves arranged from longest wavelength to shortest wavelength?

40. Name electromagnetic wave used to see a child in a burning house.
Pop Tart Review
Name electromagnetic wave used to see a child in a burning house.