Adv Physics

1
Adv Physics

• Chapter 14
• Sections 3 4

2
Mirror Math

• Mirror equation
• 1/f 1/do 1/di where f focal length
• do
  object dist
• 
  di image dist
• Magnification equation
• m - di / do where m - magnification

3
Sample Problem

• A 2 cm high object is placed 7.1 cm from a
  concave mirror whose radius of curvature is 10.2
  cm. Find the position of the image and its size.

4
Sample Problem

• An object is placed 6 cm in front of a concave
  mirror that has a 10 cm focal length. Determine
  the location of the image. If the object is 1.2
  cm high, find the image height.

5
Sample Problem

• A convex mirror is used to reflect light from an
  object placed 65 cm in front of the mirror. The
  focal length of the mirror is 45 cm. Find the
  location of the image and its size relative to
  the object.

6
Sign Conventions
7
Spherical Aberration

• Shape distortion resulting in a blurry image
• Caused by rays that reflect from points on a
  mirror far from the principal axis converge at
  slightly different points

8
Spherical Aberration

• Corrections
• use mirror with small diameter so no
• rays are far from the pa
• cover/block edges of mirror
• parabolic mirror

9
Parabolic Mirror

• Mirror that is a segment of a paraboloid (3D
  parabola)
• All rays parallel to the pa will converge to f
  regardless of where they strike the mirror
• Used in reflecting telescopes, flashlights,
  headlights

10
Opaque

• Object that doesnt allow light to pass through
  it
• Color reflected is what we see
• All other colors are absorbed
• White all colors reflected
• Black all colors absorbed

11
Transparent

• Object that allows light to pass through it
• Color transmitted is what we see
• Clear all colors transmitted

12
Color Mixing

• White can be produced with only red, green and
  blue light
• Additive primary colors- red, green and blue
  light
• - combine to produce white
• Various combos of the primary colors and varying
  intensities can produce all the colors of the
  spectrum

13
Color Mixing

• Complementary colors two colors of light that
  when added together produce white

14
Color Mixing

• Red green yellow
• Green blue cyan
• Red blue magenta
• Yellow blue white
• Cyan red white
• Magenta green
• white

15
Color Subtraction

• Pigments mix differently than light because they
  use a subtractive process
• Subtractive primary colors magenta, cyan and
  yellow
• - combine to make black

16
Color Subtraction