Physics Unit 3

relationship between angle of reflection and angle of incidence during reflection

they are equal

what happens during total internal reflection

angle of refraction = 90

what type of lens are convex lens

converging

what type of lens are concave lens

diverging

what is f for a convex/converging

positive

what is f for concave/diverging

negative

case 1 convex (do > f)

f is pos, real, di pos, m neg, inverted, di < do or di > do

case 2 convex (do < f)

f pos, virtual, di neg, m > 1, upright, di > do

case 3 concave

f neg, virtual, di neg, m < 1 pos, upright di < do

when is di (image dist) positive in a mirror

image and object are on the same side of the mirror (and is real)

when is di positive in a lens

image and object are on opposite sides of the lens (and is real)

what is the real image in a lens

object and image are on opposite sides

what is a virtual image in a lens

object and image are on the same side

what does -m mean

inverted image

what does |m| > 1 mean

image is magnified

what does |m| < 1 mean

image is reduced

are converging mirrors concave or convex?

concave

are diverging mirror concave or convex?

convex

what is f for a converging mirror

f > 0

what is f for a diverging mirror

f < 0

what is f for converging mirrors and lenses

f > 0

what is f for diverging mirrors and lenses

f < 0

what is the image type, orientation, and magnification in a plane mirror

virtual, upright, m = +1

what is the image type, orientation, and magnification in a convex mirror

virtual, upright, m <+1

what is the image type, orientation, and magnification in a concave mirror (do > f)

real, inverted, m can vary

what is the image type, orientation, and magnification in a concave mirror (do < f)

virtual, upright, m > +1 but m and di are unknown

what kind of lenses do you use for nearsightedness

diverging (concave)

what kind of lens do you use for farsightedness

converging (convex)

what is the typical far point

infinity

what is the typical near point

25 cm

what is the distance between eye and glasses

2 cm

what is the distance between the lens and retina

2 cm