## Real World Problem Solving

**Three Act Problem - Speed of Light (Challenging)**

1. As you watch the following video, consider which visual representation you think the speed of light most looks like -- the top or the bottom?

3. Calculate the time it would take for the light from a flashlight to reach the moon from the earth's surface.

4. Watch the following video to see if you were right!

4. Watch the following video to see if you were right!

Additional Challenge Questions:

- If it were bright enough, how long would it take Dan's flashlight to reach Pluto?
- Choose an object in the universe and find out how long it will take the light from Dan's flashlight to reach it.'
- If the light takes a month to reach a certain point in space, where might that point be?
- How far does light travel in ten years? (A: Ten light-years. Introduce a new unit of distance.)