2. Directions for EM Spectrum book
You will need 4 sheets of clean, untorn notebook paper.
Take one sheet and fold it hamburger style leaving, two lines exposed on the bottom.
Take another sheet and fold it the same way, only this time leave four lines exposed on the bottom.
Next sheet 6 lines exposed.
Next sheet, 8 lines exposed.
Now assemble them into a flip book and staple at the top.
Label each flap to correspond with the EM Spectrum
Color code the flaps to correspond to ROY G BIV

3. Electromagnetic spectrum Mini-book Assessment
One type of EM wave for each page
Each page should contain the:
wavelength, wave frequency, relative size, uses, facts, hazards, picture that relates to type
The front of your flip book should be colored to correspond with roygbiv…because visible light is composed of these colors of light.

6. EM Waves
Electromagnetic waves are actually made up of 2 parts: an electric force field and a magnetic force field. That’s where the name electo…magnetic comes from!
An electromagnetic wave is produced by vibrating electrical and magnetic charges.
In fact, all waves are produced by something vibrating.

8. Waves in space?
Most waves, like sound waves or oceans waves must have a medium (some form of matter) through which they travel.
However, electromagnetic waves can travel with or without a medium. This allows EM waves to travel through the empty vacuum of space. Sunlight and ultraviolet radiation that both light and heat our planet, travel millions of miles from the Sun to Earth by EM waves.

9. EM Waves are transverse waves
All electromagnetic waves are transverse waves. Transverse waves move up and down or side to side at repeated right angles in the direction of the wave’s energy.

10. Parts of a transverse wave?
Frequency
Prompt students to guess what the teal box, then the blue box, is hiding. (Wavelength, Amplitude) ?

11. Electromagnetic spectrum
Long Wavelength
Short Wavelength
High Frequency
Low Frequency

12. Electromagnetic waves
All EM waves travel at the speed of
light which is 300 million m/s.
The Sun is 150 gigameters or 95 million miles away from the Earth. Traveling at the speed of light, it take sunlight 8 minutes and 20 seconds to reach Earth….WOW!
Scientist like Einstein struggle with
the dual nature of light. On the one
hand It’s an atomic particle called a
photon. On the other it’s a EM wave.

13. The Electromagnetic Spectrum

14. Clicking the little rainbow box at the top of each slide will bring you back to this one

15. Radio waves Longest wavelength EM waves Uses: TV broadcasting
AM and FM broadcast radio
Avalanche beacons
Heart rate monitors
Cell phone communication
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

16. Microwaves Wavelengths from 1 mm- 1 m Uses: Microwave ovens
Bluetooth headsets
Broadband Wireless Internet
Radar
GPS
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

17. Micro Waves: Mobile Phones
0.2C temperature rise
Pictures from Gerard van Leeuwen

18. Micro Waves: Mobile Phones
Mobile phones use microwave energy. We know that microwaves can cook food – can a mobile phone cause heating?
Pictures from Gerard van Leeuwen
Needs explanation

19. Infrared Radiation Wavelengths in between microwaves and visible light
Uses:
Night vision goggles
Remote controls
Heat-seeking missiles
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

20. Uses of Infrared waves
Remote controls for TVs and intruder alarms

21. Infrared Thermography

22. Visible light
Only type of EM wave able to be detected by the human eye (ROY G. BIV)
Violet is the highest frequency light
Red light is the lowest frequency light
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

24. Visible light
λ ≈ 700 nm
λ ≈ 420 nm

25. Ultraviolet Shorter wavelengths than visible light Uses: Black lights
Sterilizing medical equipment
Water disinfection
Security images on money
There is one more UV slide…

26. Ultraviolet waves
λ ≈ nm

27. Ultraviolet (cont.) UVA UVB and UVC Energy Highest of UV waves
Lower than UVA
Health risks
Can cause DNA damage, leading to skin cancer
Responsible for sunburn
No serious risk for DNA damage.
Can cause Vitamin A deficiency.
Table will fill in from left to right, top to bottom as you advance through. Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

28. X-rays Tiny wavelength, high energy waves Uses: Medical imaging
Airport security
Inspecting industrial welds
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram

29. Gamma Rays Smallest wavelengths, highest energy EM waves Uses
Food irradiation
Cancer treatment
Treating wood flooring
Click the little rainbow box in the top right corner to return to the overview EM spectrum diagram