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10 science-- optics > images in lenses > Flashcards

Flashcards in images in lenses Deck (17)
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1

how do we locate images in lenses?

in the same way we locate images in curved mirrors

2

since light can go through a lens in both directions, there is __________________

a focal point on both sides of the lens

3

how many light rays are needed to locate an image in a lens?

2

4

converging lens:
a light ray parallel to the principle axis will go _______________________

through the opposite focal point (F) on the other side of the lens

5

converging lens:
a light ray that is directed towards the optical centre (O) of the lens will ______________________

maintain its original direction after leaving the lens

6

converging lens:
a light ray that goes through the focal point (F) (or appears to come from the focal point) will _____________

become parallel to the principle axis on the other side of the lens

7

location (L.O.S.T.) of image in converging lens

behind lens, beyond F

8

orientation (L.O.S.T.) of image in converging lens

inverted

9

size (L.O.S.T.) of image in converging lens

smaller than object

10

type of image (L.O.S.T.) of image in converging lens

real: the rays of light converge behind the lens

11

diverging lens:
a light ray parallel to the principle axis will _________________

refract and appear to come from the focal point on the other side of the lens

12

diverging lens:
a light ray that is aimed at the opposite focal point (on the other side) will __________________

be parallel to the principle axis after refraction

13

diverging lens:
a light ray that is directed towards the middle of the lens will __________________

maintain its original direction after passing through the lens

14

location (L.O.S.T.) of image in diverging lens

in front of lens, between F and optical centre

15

orientation (L.O.S.T.) of image in diverging lens

upright

16

size (L.O.S.T.) of image in diverging lens

smaller than object

17

type of image (L.O.S.T.) of image in diverging lens

virtual: rays of light will never meet