C- the centre of curvature=radius of a circle
F- focal point: the point where light rays converge= half of the centre of curvature
Principle Axis- perpendicular from the mirror
Physics diagrams.jpeg


To determine the reflection of an image two rays can be drawn:
Ray 1) Parallel to the Principle Axis, and then diagonally through the focal point
Ray 2) Diagonally to the mirror, and then parallel to the principle Axis (opposite)


Magnification-Same size, enlarged, diminished
Attitude-Erect or inverted
Position-displacement from mirror surface (ex. Between C and F)
Type-real (in front of mirror) or Virtual (behind mirror)
Physics diagrams 1.jpeg
Image- diminished, inverted, between C and F, real

The Mirror Equation:
1⁄ƒ= 1⁄di + 1⁄do
Where: ƒ= focal length
di= distance of image from mirror
do= distance of object from mirror

Example 1: Using diagram to the right
Determine the distance of the image from the mirror
ƒ= 3.00cm do=7.00cm
1⁄di = 1⁄ƒ − 1⁄do
1⁄di = 1⁄3.00cm − 1⁄7.00cm
1⁄di = 0.1905
di = 5.25cm

The Magnification Equation
m = hi⁄ho = −di⁄do
Where: hi= height of image
ho= height of object

Example 2: Using information from previous example
Determine the height of the image
hi⁄ho = -di⁄do
hi⁄1.50cm = −5.25cm⁄7.00cm
hi = 1.13cm

Example 3) How to draw a ray diagram
Physics diagrams 2.jpeg
Image- enlarged, erect, behind mirror, virtual