Unit 1: Can I Believe My Eyes? Scientific Principles

1. When light reaches an object it is scattered (or reflected), transmitted, absorbed, or some ___________ of these.
2. Filters color light by absorbing certain colors and ___________ the rest.
5. Light can make things happen when it is _______.
7. When different colored lights are ______, they appear as a new color, brighter than the original colors.
8. An object can be seen if four conditions are met: there needs to be an object, an _____, a source of light, and a direct path between the object and the eye.
12. ______ occurs when light bounces off an object only in a certain direction. This occurs when the surface of the object is smooth and polished.
13. Different wavelengths of ______ light appear to us as different colors.
14. A ________ is seen by detecting that less light reaches the eyes from it than from the area surrounding it.
16. ______ occurs when light bounces off an object in all directions. This occurs when the surface of the object is rough and unpolished.
17. Light continues traveling until it reaches an ________.
18. Light travels in _______ lines.

1. ________ objects scatter only certain colors of light and absorb the rest.
3. Some objects are _________ and let light pass through them (in an orderly fashion).
4. A reflection of one object is seen in a second object only if the second object ________ light, not if it scatters it.
6. More light enters the eye from areas of greater perceived brightness (The _________ an object appears, the more light that reaches the eye, or detector).
9. There are many different _______ of light. Most of these cannot be seen.
10. A shadow is formed behind an object that ______ the path of light.
11. ______ must enter the eye or sensor to be seen or detected.
15. _____ light is a mixture of all colors of light – it is the brightest color. Black is the color associated with the absence of light.