Physics - Chapter 16

16.3

Concave Mirror - Mirror that curves inwards
Convex Mirror - Mirror that bulges outwards
Center of Curvature - Center of the sphere of which the curved mirror is a section
Principal Axis - Drawn through the center of curvature and the midpoint of a curved mirror
Focal Point - The point at which rays reflecting from the surface of a mirror converge
Focal Length - The distance from surface of the curved mirror to the focal point
Focal length for a Concave Mirror with radius (R)
- focal length = $\frac{1}{2}$ x radius of curvature
- f = $\frac{1}{2}$ R
- SI Unit: m
Focal length for a convex mirror of radius R
- focal length = - $\frac{1}{2}$ x radius of curvature
- f = - $\frac{1}{2}$ R
- SI Unit: m
The Mirror Equation
- $\frac{1}{o bj ec t d i s t an ce}$ + $\frac{1}{ima g e d i s t an ce}$ = $\frac{1}{f oc a ll e n g t h}$
- $\frac{1}{d _{o}}$ + $\frac{1}{d _{i}}$ = $\frac{1}{f}$
Magnification
- magnification = $\frac{im g h e i g h t}{o bj ec t h e i g h t}$ = - ( $\frac{im g d i s t an ce}{o bj ec t d i s t an ce}$ )
- m = $\frac{h _{i}}{h _{o}}$ = - $\frac{d _{i}}{d _{o}}$