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

Physics 014Images

TopicsPlane mirrorsSpherical mirrorsThin lenses

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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