====Powerful Ideas about Light, Shadows, and Pinhole Explorations (and the evidence to demonstrate them)====

**Navigation Links**

[[activities:light:start|Light Activities]]\\
[[activities:sun_earth_moon:start|Sun/Earth/Moon System Phenomena]]\\
[[days:fall2009daybyday:fall2009day4:start|Fall 2009-Day 4]]\\

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1. **Light travels outward in all directions from a light source**\\
(light dispersed on screen from clear bulb with vertical filament)\\

2. **Light travels in straight lines**\\
(shadow formed by obstacle in front of a light source)\\
(confirmed by use in explaining pinhole phenomena)\\

3. **Light travels outward in all directions from an object one can see**\\
(Emily’s nose)\\

4. **To see an object, light has to travel from the object to your eye**\\
(To make a shadow bigger, move the light source closer to the object or move the screen farther away)\\