Academia007

Vocabulary: eclipse, penumbra, point source, umbra Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Try this experiment: Shine a flashlight (or a desk lamp) on your hand so that it casts a shadow on a sheet of white paper. Hold your hand about 15–30 cm (6–12 inches) above the paper. 1. Look at the edges of the shadow. Are they sharp or fuzzy? They are fuzzy 2. Move your hand up and down. How does this affect the fuzziness of the shadow? The closer it gets the more fuzzy 3. Why do...