Topic C Physics (rays through converging and diverging mirrors and lenses)

Focal point

The point at which all rays meet, f: distance from lens to focal point

Diopters

Units used to express the power of a lens; diopters \= 1/(focal length), 1D\= focal length of 1m

Center of curvature (C)

The center point of the sphere, C\=2f in mirrors

Image distance (di)

Distance from the lens to the image

Object distance (do)

The distance from the mirror to the object

Linear magnification (m)

Ratio of the height of the image to the height of the object (hi/ho)

Near point

The closest distance at which an eye can focus

Far point

As a light is moved toward the eye, the distance at which the light becomes focused on the retina

RBG

Red, green, and blue, additive colors, all can be added to make white

M/Y/C

Magenta, yellow, cyan, subtractive colors, all can be added to make black

Lens

A material shaped to cause light rays to bend in a specific way

Mirror

A reflective surface that bounces off light

Hue

just color, generalization

Saturation

purity/vibrancy of a color

Brightness

Intensity of light

m is greater than 1

enlarged image

m is less than 1

reduced image

-hi

inverted image

+hi

upright image

Blue + Red

Magenta

Red + Green

Yellow

Green + Blue

Cyan

1/f

1/u + 1/v (1/do +1/di)

\+di

real

\-di

virtual