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Science Olympiad Optics Color and Shadows Optics Slide 2 The Electromagnetic Spectrum. Slide 3 Behavior of Light: Shadows - One Light Bulb Use rays to predict what one would observe if there was one light source. Behavior of Light: Shadows - One Light Bulb Use rays to predict what one would observe if there was one light source. Draw the kissing rays. The rays that just clear the barrier. Draw the kissing rays. The rays that just clear the barrier. Barrier Shadow Light So, what do we see on the screen? Slide 4 Behavior of Light: Shadows - One Light Bulb Use rays to predict what one would observe if there was one light source. Behavior of Light: Shadows - One Light Bulb Use rays to predict what one would observe if there was one light source. There are many rays that leave the light bulb that go in all directions. Barrier Shadow Light Slide 5 Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources. Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources. Draw the kissing rays from bulb, B 1. Draw the kissing rays from bulb, B 2. So, what do we see on the screen? Slide 6 Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources of different colors. Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources of different colors. So, what do we see on the screen? Slide 7 Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources of different colors. Behavior of Light - Two Light Bulbs Use rays to predict what one would observe if there were two light sources of different colors. Lets review where the light shines. Slide 8 Color By Addition. ~ Light! Slide 9 Color by addition. Blue, red and green light from three different projectors. Slide 10 Now you try this one and then I will show you the results. Slide 11 Slide 12 Slide 13 RED + BLUE = MAGENTA RED + BLUE + GREEN = WHITE BLUE + GREEN = CYAN Slide 14 Slide 15 Slide 16 Science Olympiad Ray Optics Reflection Reflection Slide 17 Lab - Reflection - Law of Reflection Part 1 Where does the reflection of something appear? Select what you think is correct. a)In front of the mirror. b)On the mirror. c)Behind the mirror. d)In the mirror. When you look in a mirror where does the reflection appear? Lab - Reflection - Law of Reflection Part 1 Where does the reflection of something appear? Select what you think is correct. a)In front of the mirror. b)On the mirror. c)Behind the mirror. d)In the mirror. When you look in a mirror where does the reflection appear? Slide 18 A ray of light leaves the object and strikes the mirror, incident ray. The image appears where the reflected rays intersect. They are diverging, they only intersect behind the mirror. Image Object The ray reflects off the mirror, reflected ray. Where they intersect is called the image. More will be explained later. As it turns out, the distance from the object to the mirror, D o, is the same as the distance from the mirror to the object, D i. Slide 19 Draw a normal (line perpendicular to the mirror) where the incident ray strikes the mirror. The angle between the incident ray and the normal is the angle of incidence,