Reflection Lab What is the relationship between the angle in and the angle out for light on a mirror?
Reflection Lab Consensus: The angle of incidence = the angle of reflection New Terms: Normal – the imaginary line perpendicular to the mirror. Angle of incidence – angle between the light beam and the normal. Angle of reflection – angle between the reflected beam and the normal.
Two types of reflection: When waves bounce off a surface. When light bounces off an opaque object. Two types of reflection: Regular Diffuse
Reflection Regular reflection Diffuse reflection
The angle of incidence equals the angle of reflection Anatomy of a ray Law of Reflection The angle of incidence equals the angle of reflection
object distance = image distance Law of Reflection For plane mirrors: object distance = image distance
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Abe can see: Eva, Flo, Guy and Han
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Bev can see: Don, Eva, Flo, Guy and Han
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Cis can see: Himself, Don Eva, Flo, Guy and Han
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Don can see: Bev, Cis, Himself, Eva, Flo, Guy and Han
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Eva can see: Abe, Bev, Cis, Don and Herself
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Flo can see Abe, Bev, Cis, Don and Eva
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Guy can see: Abe, Bev, Cis and Don
Law of Reflection ABE BEV CIS DON EVA FLO GUY HAN Han can see: Abe, Bev, and Cis
Law of Reflection
Law of Reflection
Refraction Lab What is the relationship between the angle in and the angle out of light through a transparent solid?
Refraction Lab Consensus: As light travels into an optically dense object, it bends toward the normal. New Terms: Refraction – the change of direction of light as it passes through a substance.
Refraction When light passes through a transparent material. In a vacuum, light travels at 3 X 108 m/s, but since it is a wave, it travels at different speeds through different media. Unlike sound, the more dense an object, the slower light travels.
Refraction Because light slows down it is bent in a different direction. This is refraction.
Refraction
Law of Refraction As light travels from a less dense medium into a more dense medium, the angle gets closer to the normal As light travels from a more dense medium into a less dense medium, the angle gets farther away from the normal.
Law of Refraction
Law of Refraction
Law of Refraction
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Law of Refraction
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Law of Refraction
Atmospheric Refraction On very hot days, the air near the ground is warmer than the air above it. Since particles in warmer air are farther apart, light travels faster, causing refraction.
Atmospheric Refraction You can actually see the sun after it has dropped below the horizon for several minutes because the light is refracted by the earth’s atmosphere. The same thing occurs at sunrise.
Atmospheric Refraction
Rainbows Occur when light from the sun is dispersed by water droplets in clouds, or falling rain drops.
Rainbows Rainbows are actually circles. You can clearly tell from above. We would see them as circles as well, except that the ground gets in the way!
Total Internal Reflection Occurs when light rays are at such an angle to the boundary between two different media that it “can’t escape” and is instead reflected.
Total Internal Reflection
Total Internal Reflection
Total Internal Reflection This is the science that led to fiber optics.
Law of Refraction
Law of Refraction
Law of Refraction
Law of Refraction
Law of Refraction
Law of Refraction
Law of Refraction
Law of Refraction