1. Look out answers to Page 21, Q. 24, 26, 28 and 30

2. Open up your notes at page 8, note 14,Electromagnetic family, and collect a highlighter or coloured pen. electromagnetic 3 x 10 8 ms -1 Micro waves Infrared Ultraviolet Gamma rays low high longshort MUST MEMORIZE THE CORRECT ORDER

3. wavelength frequency wavelength energy radio longest -9

4. f = ?  = 1400 nm = 1400 x 10 -9 m v = 3 x 10 8 ms -1 f = v  = 3 x 10 8 1400 x 10 -9 = 2.1 x 10 14 Hz

5. S3/5 Physics – The Electromagnetic Spectrum Experiences & Outcomes By carrying out a comparison of the properties of parts of the electromagnetic spectrum beyond the visible, I can explain the use of radiation and discuss how this has impacted upon society and our quality of life. SCN 4-11b

6. Research Task 1.Consider the electromagnetic spectrum: Radio & TV Micro waves Infra red Visible light Ultra violet X-Rays Gamma radiation Increasing frequency, increasing energy, decreasing wavelength. All waves in the em spectrum travel at the speed of light!

7. Radio & TV Micro waves Infra red Visible light Ultra violet X-Rays Gamma radiation Increasing frequency, increasing energy, decreasing wavelength. 3.Find out: How is your chosen part of the em spectrum used in industry, medicine and /or communication? What are the disadvantages or dangers of using this part of the em spectrum? How has it benefited society?

8. Radio & TV: Microwaves: Infra Red: Visible Light: Ultra Violet: X-Rays: Gamma: IN YOUR GROUP Prepare a short presentation (with poster) to let the rest of the class know about your chosen part of the em spectrum. You will be presenting on Friday. Get into 7 groups – Each group chooses One of the topics from the left. First group to write their name beside the topic gets to research and present that one.