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Published byOswin Carpenter Modified over 9 years ago
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Optics Can you believe what you see?
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Optics Reflection: Light is retransmitted from or “bounces off” an object
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Optics Law of Reflection: The angle of incidence equals the angle of reflection.
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Optics Refraction Light “bends” or changes its angle as it moves from one medium to another.
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Optics Images What you “see” when you look into a mirror or through a lens.
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Optics Real Image A real image can be projected onto a surface. Virtual Image A virtual image cannot be projected onto a surface.
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Optics Mirrors Plane Mirrors Flat mirrors Always produce an image that is behind the mirror.
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Optics Mirrors Spherical Mirrors Concave mirror Formed on the inside of a sphere Convex mirror Formed on the outside of a sphere
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Spherical Mirrors
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Optics Basic Terminology Focal Point The point where parallel beams of light converge after reflecting Center of curvature The center point of the circle made by a concave or convex mirror.
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Optics Lenses Converging Lens Parallel beams of light come together after refracting through the lens Example: Magnifying Glass
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Optics Lenses Diverging Lens Parallel beams of light spread apart after refracting through the lens Example: Certain eye glasses
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Optics Ray Diagrams Let us predict where an image will form A light ray is drawn as a simple line with an arrow indicating the direction
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Optics Concave mirrors—principle rays Incident ray parallel to axis, reflected ray through the focal point
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Optics Concave mirrors—principle rays Incident ray through the focal point, reflected parallel to axis
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Optics Concave mirrors—principle rays Incident ray through the center point, reflected through the center point
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Optics Concave mirrors—examples Image is smaller, inverted and real
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Optics Convex mirrors—principle rays Incident ray parallel to the axis, reflected away from focal point (virtual) (virtual ray)
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Optics Convex mirrors—principle rays Incident ray toward the focal point, reflected parallel to the axis
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Optics Convex mirrors—principle rays Incident ray toward the center point, reflected toward away from the center point
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Optics Convex mirrors—examples Image: smaller, upright, virtual
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Optics Converging Lens
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Optics Converging Lens
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Optics Converging Lens
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Optics Converging Lens
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