1. EM Spectrum Wednesday, February 25, 2015

2. Unit 8: EM Spectrum/Optics Wednesday, 2/25  Pick up a warm-up sheet from the Physics bin.  Draw the mind map below on your warm-up sheet. Think back to the article you read after the test last week. Predict what will be drawn under the EM wave section. Upcoming dates:  Friday, 2/27 – EM Spectrum project due  Thursday, 3/5 – Open note quiz  Monday, 3/9 – Spring break starts  Wednesday, 3/18 – tentative date for EM Spectrum/Optics test  Thursday, 4/2 – 5SW extra credit due by 4:30  Friday, 4/10 – End of 5SW

3. Guiding Questions 1. If electromagnetic waves don’t require a medium what is vibrating (causes the disturbance)? (resource 1) 1. What do wavelength and frequency tell us about a wave? (resource 1) 2. There are seven regions in the EM spectrum. What is used to define the regions? What are the names of the regions? (resource 1 and 2) 3. Summarize key points about each region of the EM spectrum (resource 2). 1. How can you use a diagram to describe the various energy levels of the EM spectrum? (include a diagram of the EM spectrum in your response). (resource 2) 1. What velocity do EM waves travel? (resource 3)

4. Guiding Questions (Cont.) How can you use a diagram to describe the various energy levels of a EM wave? (include a diagram of the EM spectrum in your response). (resource 2)

5. Visible Light Spectrum

6. Practice Problems  When you are finished with your practice problems do the following:  Show me your completed work.  Check your answers.

7. EM Spectrum Assignment Draw the EM Spectrum and include the following: 1. Draw the wavelength and frequencies of each EM wave to scale. 1. Label the 7 different EM waves. 2. List two facts you have learned about radio waves, microwaves, infrared waves, ultraviolet waves, x-rays, and gamma rays. 3. Diagram the visible light spectrum and describe how each of the waves in the spectrum are different.