sci Flashcards
1
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Refraction
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- is the bending of light as it travels from one
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medium to another of different optical densities.
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Refraction of Light in Lens
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the ray of
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light coming
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from the
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light source
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towards a
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surface
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Incident Ray
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the angle
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between the
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incident ray
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and normal
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line
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Angle of
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incidence
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e
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Normnal
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the angle
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between the
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refracted ray
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and normal
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a line that is perpendicular
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to the surface
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line
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| Angle of
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refraction
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Refracted Ray the ray of light
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Refraction of a Light Ray on a Plane
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that enters
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the lens
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Lens
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Lens is a transparent
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material made of glass or
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plastic that refracts light
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rays and focuses (or
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appear to focus) them at
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a point.
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CONVEX LENS
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• It is thicker in the center than edges.
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• It forms real imnages and virtual
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images depending on position of the
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object. In very distant object
it gives
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an inverted image.
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•It is also called Converging Lens
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because the light that passes through
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it tends to converge at a particular
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point called the focal point.
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Conex
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|Convex lens
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TFocus
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CONCAVE LENS
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• It is thicker at the edges and thinner
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in the center.
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•It forms upright and reduced images.
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•It is also called Diverging Lens
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because the light that passes
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through it tends to diverge at a
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particular point called the focal point.
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Concave
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Concave lens
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Convex lens
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light rays
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object
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principle
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axis
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Real and Inverted image.
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Image appear closer and larger.
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image
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2F
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concave lens
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object image
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principle
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axis
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F
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light
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Appear smaller and farther.
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ray
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light
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ray
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2F
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Virtual
erect and diminished image.
