science exam - optics

Question 1

what is the angle of reflection

Answer 1

angle of reflection = anglee of refracton. so if you put an angle at 10 degrees it will reflect 10 degrees

Question 2

what is refraction

Answer 2

when light enters a new medium and either speeds up or slows down due to the optical density.

Question 3

when light slows where does it go

Answer 3

as things become more optically dense they travel slower so it bends more towards the normal

Question 4

lens law:
rules for do
rules for di
rules for f

Answer 4

do is always positive
di is positive for real images and negative for virtual
f is positive for convex and negative for concave

Question 5

how do eyes work

Answer 5

light moves into eye and onto the retina, where the light is sensed and information is moved from optic nerve to hte brain.

Question 6

wgat is near sightedness

Answer 6

myopia, where there are no problems seeing near, difficulty seing far. where light focuses infront of the retina.

Question 7

how do you fix near sightedness

Answer 7

diverging lens that is thinner in the middle and thicker on the edges (concave)

Question 8

what is far sightedness.

Answer 8

hyperopia, where light focuses behind the retina. difficulty seeing close up.

Question 9

how do you fix hyperopia

Answer 9

converging lens or (convex)

Question 10

what is accomodation

Answer 10

when your eyes focus.