20 Optics 5

# 20 Optics 5 - A concave spherical mirror has a reflecting...

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Unformatted text preview: A concave spherical mirror has a reflecting spherical surface and is characterized by two major points: F – focal point and C – the center of curvature of the spherical surface. A parallel beam of light directed parallel to the optical axis is focused into the focal point, F . Spherical mirrors 4 special rays: 1. Any ray parallel to the mirror axis reflects through the focal point. 2. Any ray that passes through the focal point reflects parallel to the axis 3. Any ray that strikes the center of the mirror reflects symmetrically about the mirror axis. 4. Any ray through the center of curvature strikes the mirror normal to the mirror surface and thus reflects to itself. Spherical mirrors Focal length, f . Mirror equation Distance between the object and the mirror, l Distance between the image and the mirror, l’ 2 / R f = R radius of curvature of the lens surface f l l 1 ' 1 1 = + Mirror equation l’ is positive, if the image is on the same side as the object, as shown 1 , / ' ; 2 ' and ' , 2 , < < − = < > > > M l l M f l l f l f Real, inverted, reduced f f l l l h h − = = − ' ' ' A concave spherical mirror has a reflecting spherical surface and is characterized by two major points: F – focal point and C – the center of curvature of the spherical surface....
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20 Optics 5 - A concave spherical mirror has a reflecting...

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