# Physics 014 Images. Topics  Plane mirrors  Spherical mirrors  Thin lenses

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### Text of Physics 014 Images. Topics  Plane mirrors  Spherical mirrors  Thin lenses

• Physics 014Images

• Plane MirrorsA virtual image CANNOT be seen on a screenA real image CAN be seen on a screen

• Plane Mirrors

• Plane Mirrors

• Plane MirrorsO is a point source of lightIncident beams from O reflect off plane mirrorBeams reflect at angles consistent with law of reflectionExtend reflections to I, the virtual point image

• Plane Mirrors

• Plane MirrorsFor the plane mirror,

i=-p

i is the image distance, p is the object distance

• Plane Mirrors

• Plane MirrorsFor extended objectsDraw ray from base Draw several rays from tipWhere ray extension from tip converge is tip image point

• Spherical MirrorsTwo types of spherical mirrorsConcave mirror: light rays converge on real focusConvex mirror: light rays diverge from virtual focus

• Spherical Mirrors

• Concave mirrors: Increase image sizeMove image farther awayReduce field of viewSpherical Mirrors

• Convex mirrors: Decrease image sizeMove image closerIncrease field of viewSpherical Mirrors

• Spherical MirrorsWe can find an expression relating the distances f, p, and i

• Spherical MirrorsHow do I find the image using rays?

• Spherical Mirrors

• Spherical Mirrors

• Spherical MirrorsExtend rays from tip and base of object to determine image location and orientation

• Spherical MirrorsParallel ray reflected through focal pointRay through focal point reflected parallelRay through centerRay reflected symmetrically from c

• Thin LensesTwo types of lensesConverging lenses cause rays to converge on focal pointDiverging lenses cause rays to diverge from focal point

• Thin Lenses

• Thin Lenses

• Thin LensesWe may use the same equation we used for mirrors to relate i, p, and fThis is not the lens makers equation!

• Thin Lenses

• Thin LensesRay initially parallel converge on focal pointRay initially through focal point emerges parallelRay through center emerges unchanged

• Thin Lenses

• Thin Lenses

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