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Chapter 17:  Part 2: Electromagnetic Spectrum
Can light travel through vacuum?
Light  1. Light belongs to a special group of waves called  Electromagnetic Waves 2. Electromagnetic waves  can  travel through vacuum.  3. Light is  not the only   member of Electromagnetic spectrum. There are different types of waves in the spectrum.
What is Electromagnetic Spectrum? ,[object Object],What is Electromagnetic spectrum? It is a range of colours of light. It is a range of radiation.
The Electromagnetic Spectrum Gamma rays X-rays ultraviolet Infrared Visible light Microwaves Radio waves
The properties of Electromagnetic Waves   ,[object Object],[object Object],[object Object],[object Object]
Karaoke! ,[object Object],[object Object],[object Object],[object Object],[object Object]
From the TV station to your living room That is the work of  radio waves Heating food in just seconds Microwaves  do that  Heat treatment for illness Take pictures in the dark They are even in your remote control Infrared  radiation Red  orange yellow green blue indigo  violet That is the only part of the spectrum  That can be seen by us The suntan on your skin Kill bacteria and viruses Used to detect forgery That is  ultraviolet See your broken bones and my hidden bombs That is the work of  x rays Kill cancer cells and sterilize Dangerous  gamma rays  do that Q: Which one has the highest level of energy?
Applications of EM waves
Radio waves ,[object Object],[object Object]
Radio waves ,[object Object],[object Object]
Radio waves ,[object Object]
Microwaves ,[object Object],[object Object]
Microwaves ,[object Object],[object Object]
Infrared ,[object Object]
Guess what is this?
Guess what is this?
Guess what is this?
Guess what is this?
Infrared ,[object Object],[object Object]
Visible light  enables us to see!
Visible light  ,[object Object]
Ultraviolet  ,[object Object]
Ultraviolet  ,[object Object]
Dangers of UV light ,[object Object],[object Object]
X ray  ,[object Object],[object Object]
Gamma radiation ,[object Object],[object Object],[object Object]

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The Electromagnetic Spectrum

  • 1. Chapter 17: Part 2: Electromagnetic Spectrum
  • 2. Can light travel through vacuum?
  • 3. Light 1. Light belongs to a special group of waves called Electromagnetic Waves 2. Electromagnetic waves can travel through vacuum. 3. Light is not the only member of Electromagnetic spectrum. There are different types of waves in the spectrum.
  • 4.
  • 5. The Electromagnetic Spectrum Gamma rays X-rays ultraviolet Infrared Visible light Microwaves Radio waves
  • 6.
  • 7.
  • 8. From the TV station to your living room That is the work of radio waves Heating food in just seconds Microwaves do that Heat treatment for illness Take pictures in the dark They are even in your remote control Infrared radiation Red orange yellow green blue indigo violet That is the only part of the spectrum That can be seen by us The suntan on your skin Kill bacteria and viruses Used to detect forgery That is ultraviolet See your broken bones and my hidden bombs That is the work of x rays Kill cancer cells and sterilize Dangerous gamma rays do that Q: Which one has the highest level of energy?
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16. Guess what is this?
  • 17. Guess what is this?
  • 18. Guess what is this?
  • 19. Guess what is this?
  • 20.
  • 21. Visible light enables us to see!
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.

Editor's Notes

  1. Take a vote
  2. Light is just a small part of electromagnetic wave, what are others?
  3. Electromagnetic spectrum song
  4. When you are tuning the radio, you are actually searching for the right wavelength/frequency so that you can receive the signal sent out by the radio transmitting tower.
  5. The antennae on your television set receive the signal, in the form of electromagnetic waves, that is broadcasted from the television station. It is displayed on your television screen.Cable companies have antennae or dishes which receive waves broadcasted from your local TV stations. The signal is then sent through a cable to your house. Why are car antennae about the same size as TV antennae?
  6. http://www.howstuffworks.com/cell-phone-radiation.htm
  7.  microwave oven cooks food because the  water  molecules inside it absorb the microwave radiation and thereby heat up and heat the surrounding food.