1. Chapter 14B Visible Light

2. Light Characteristics All light travels in a straight line unless something gets in the way. Then one of three things can happen: Reflection - reflect it (like a mirror) Refraction - bend it (like a prism) or scatter it (like molecules of the gases in the atmosphere)

3. Light Waves light energy travels in waves, too. Some light travels in short, "choppy" waves. Other light travels in long, lazy waves. Blue light waves are shorter than red light waves.

4. Reflection the change in direction of a wave front at an interface between two dissimilar media so that the wave front returns into the medium from which it originated.waveinterfacemedia may be specular (that is, mirror-like) or diffuse (that is, not retaining the imagespecular diffuse

5. Specular vs Diffuse Reflection Diffuse - When light strikes a rough or granular surface, it bounces off in all directions due to the microscopic irregularities of the interface. Thus, an image is not formed. Specular - light from a single incoming direction is reflected into a single outgoing direction

6. How is something a color? The color of an object is not actually within the object itself; rather, the color is in the light which shines upon it that ultimately becomes reflected or transmitted to our eyes.

7. What color are the papers?

8. Transparent The appearance of a transparent object is dependent upon what color(s) of light is/are incident upon the object and what color(s) of light is/are transmitted through the object

9. Color Perception Primary Colors - a color that cannot be created by mixing other colors.color The three primary colors of pigments are magenta, yellow, and cyan. magentayellowcyan

10. The Color White When all the wavelengths of the visible light spectrum strike your eye at the same time, white is perceived. Technically speaking, white is not a color at all, but rather the combination of all the colors of the visible light spectrum

11. The Color Black black is merely the absence of the wavelengths of the visible light spectrum. when you are in a room with no lights and everything around you appears black, it means that there are no wavelengths of visible light striking your eye as you sight at the surroundings. black is not actually a color

13. Whys is the sky blue? Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time

15. Why is the sun yellow? the light that is not scattered is able to pass through our atmosphere and reach our eyes in a non-interrupted path. The lower frequencies of sunlight (ROY) tend to reach our eyes as we sight directly at the sun during midday.

16. Why is the sunset red? the appearance of the sun changes with the time of day. as the sun approaches the horizon line, sunlight must travel a greater distance through our atmosphere.

17. Why are clouds white? Light is made up of colors of the rainbow and when you add them all together you get white. Clouds reflect all the colors the exact same amount so they look white. …or cuz they’re made from cotton candy…

18. Why do clouds turn gray? Clouds are made up of tiny water droplets or ice crystals, usually a mixture of both. The water and ice scatter all light, making clouds appear white. If the clouds get thick enough or high enough all the light above does not make it through, then they look gray or dark.