PHYSICS 7E Lecture Notes - Lecture 18: Plane Mirror
PHYSICS 7E - Lecture 18 - Geometric Optics
*Images from University Physics, Young & Freedman
●Light (ray approx.) travels in straight lines unless something gets in its
way
●Eye: Always assumes that light enters it got there by moving in a
straight line
●Image: looks to our eye like light is emanating from it
●Object: light actually originates from
Mirrors
●Plane (flat mirror)
●angle of incidenceθi=
●angle of reflectionθr=
Image location:
●Location where our eyes think
light came from (extrapolate
incoming reys to our eyes
backwards, where these rays
intersect)
14
PHYSICS 7E Full Course Notes
Verified Note
14 documents
Document Summary
Physics 7e - lecture 18 - geometric optics. Light (ray approx. ) travels in straight lines unless something gets in its way. Eye: always assumes that light enters it got there by moving in a straight line. Image: looks to our eye like light is emanating from it. Plane (flat mirror) angle of incidence angle of reflection. Location where our eyes think light came from (extrapolate incoming reys to our eyes backwards, where these rays intersect) Light rays from a point radiate in all directions. Light rays from an object point reflect from a plane mirror as though they came from the image point. Objects or images are always located by extending diverging rays back to a point at which they intersect. Images are located either at a point from which the rays of light actually diverge (real) or at a point form which they appear to diverge (virtual) Image formation by a plane mirror or interface.
