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.

5. The Electromagnetic Spectrum Gamma rays X-rays ultraviolet Infrared Visible light Microwaves Radio waves

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?

9. Applications of EM waves

16. Guess what is this?

17. Guess what is this?

18. Guess what is this?

19. Guess what is this?

21. Visible light enables us to see!