WAVES-Lenses Flashcards
(13 cards)
describe shape of convex lens
thicker at centre
thinner at edges
<=>
where does light bend towards when passing into/out of lens
INTO LENS:
light bends towards normal
OUT OF LENS:
light bends away from normal
whats another phrase for central ray that passes through convex lens without being refracted
ray passing along principal axis
what do u call the point which all rays focus on
principal focus (F)
whats the distance from centre of lens to principal focus called
focal length
what is focal length
distance from centre of lens to principal focus
why do different convex lenses have different focal lengths
depends on strength of lens
what 3 pairs of words can be used to describe images
-real/virtual
-dimished/magnified
-upright/inverted
what 2 things do u need to do for a magnifying glass
-use a convex lens
-place object at less than 1 focal length
how does image appear through magnifying glass
virtual, upright, magnified
what does concave lens look like
thinner in centre
thicker at edges
>=<
whats the word for when light rays spread out through concave lens
light rays diverge
what 3 things will images through concave lenses be
-diminished
-virtual
-upright
