physics - the human eye

Question 1

controls amount of incoming light

Answer 1

iris - diaphragm

Question 2

allow light to enter

Answer 2

pupil - apeture

Question 3

refracts light and forms sharp image

Answer 3

cornea - converging lens

Question 4

creates image on a screen

Answer 4

retina - light-sensitive film or digital senser

Question 5

eye lens and cornea combination produces an __,__,__ image on the brain where it translates to an upright image

Answer 5

smaller, real, inverted

Question 6

hyperopia (far sightedness)

Answer 6

-trouble seeing close
-occurs because the distance between lens and retina is too small and lens/cornea is too weak
-positive meniscus lens

Question 7

presbyopia (age)

Answer 7

-eye loses elasticity
-glasses with converging lens

Question 8

myopia (near-sightedness)

Answer 8

-cant focus on far objects
-distance between lens and retina is too large or cornea/lens combination is too strong
-negative meniscus

Question 9

astigmatism

Answer 9

caused by too much fluid behind cornea+ blur along 1 direction

Question 10

glaucoma

Answer 10

fluid build up, increasing pressure and changing shape, dark and light spots

Question 11

cataracts

Answer 11

proteins on surface of lens causes light to disperse and create a blurry vision

Question 12

examples of lens applications

Answer 12

-camera
-film projector
-magnifying glass

Question 13

flattened sun

Answer 13

denser air near surface - refraction

Question 14

apparent sunsets

Answer 14

temperature differences - light bends

Question 15

water on pavement - mirage

Answer 15

-temperature affects density of air - hot close to the road is hotter, causing light to bend

Question 16

rainbow

Answer 16

light travels through water they refract and disperse white light

Question 17

converging - convex (+) examples

Answer 17

-idk fuck

Question 18

all convex mirrors have the same salt

Answer 18

smaller, upright, behind mirror, virtual