1. Do Now Heading: The Speed of Sound and The Speed of Light
Textbook Return Dates
Thursday ( Period 1 and 2)
Friday ( Period 3)
Final Quiz This Wednesday

2. Answer the following
Andrew is waiting at a crosswalk. Andrew is blind so he listens to sounds before knowing when it is safe to cross. As Andrew is about to cross the street his friend pulls him backing saying that it is unsafe because he hears a firetruck siren. Andrew listens to the siren and hears a low pitch long wavelength noise. Is it safe for Andrew to cross? Explain why or why not and describe the motion of the fire truck.

3. The Doppler Effect

4. Write/Answer the following
When a lightning storm happens we typically see the flash of light before hearing the boom. Why do you think this happens? Write at least complete sentences and use your knowledge about sound and light waves to help you.

5. Speed of Sound Vs Speed of Light

6. But……
Depending on the material the wave is going through, the velocity of the wave can be changed!!!

7. Your Task
Using the wave equation you will: a) Solve for the velocity of a wave in each medium ( for both sound and light) b) Rank the different mediums from fastest to slowest

8. State of Matter and Velocity
Air Water Glass Vacuum