Adv Physics

1
Adv Physics

• Chapter 14
• Section 3

2
Spherical Mirrors

• Concave mirror reflective surface curves away
  from the object
• Convex mirror reflective surface curves toward
  the object

3
Important Points

• Object___________f_______C_________
• Principal axis pa line perpendicular to
  mirror
• Vertex V point where pa intersects mirror
• Focal point f point where rays parallel to pa
  will cross
• Center of curvature C equal to 2f
• Segment Vf focal length distance from vertex
  to focal point

4
Principal Rays for a Concave Mirror

1. Ray parallel to the principal axis reflects and
   goes through f
2. Ray through f reflects and goes parallel to pa
3. Ray through C reflects and goes straight back
   through C

5
Principal Rays for a Concave Mirror
6
Principal Rays for a Concave Mirror
7
Principal Rays for a Concave Mirror
8
Types of Images

• Virtual Image imaginary image
• - image formed behind the mirror where the
  light seems to cross
• Real image image formed in front of the mirror
  where the light really does cross

9
Principal Rays for Convex Mirror

1. Ray parallel to pa reflects so it looks like it
   came from f
2. Ray toward f reflects parallel to pa
3. Ray toward C reflects straight back through C

10
Principal Rays for a Convex Mirror
11
Location of object Location of Image Size of Image Type of Image Orienta-tion
Infinity At f Dot Real Inverted
Between C and infinity Between f and C Smaller Real Inverted
At C At C Same Real Inverted
Between C and f Between C and infinity Larger Real Inverted
At f Infinity Larger Real Inverted
Less than f Other side Larger Virtual Upright
Any-where Other side Smaller Virtual Upright