THE EYEBALL

Question 1

Ciliary Muscles

Answer 1

Focus light by changing the shape of the lens

Question 2

Cornea

Answer 2

Refracts light towards the pupil

Question 3

Pupil

Answer 3

The hole that light travels through

Question 4

Iris

Answer 4

Coloured part of the eye. Controls the amount of light that passes through

Question 5

Lens

Answer 5

A convex lens in the eye that focuses light onto the retina

Question 6

Retina

Answer 6

Sends signals to the brain through the optic nerve

Question 7

Optic Nerve

Answer 7

Sends signals to the brain

Question 8

Vitreous Humor

Answer 8

Gel that fill the eye. Provides protection and support

Question 9

Accomodation

Answer 9

The function/ability of changing the thickness of the lens to focus the image

Question 10

Inverted

Answer 10

Flipped vertically, upside down

Question 11

Focal Point

Answer 11

The point in which the refracted light rays from the lens converge together, where the light rays cross over

Question 12

Blind spot

Answer 12

A spot in your eye in your vision where you can’t see.

Question 13

Nearsightedness

Answer 13

When the cornea of your eye is overly curved or too long.

To correct nearsightedness, you have to stretch the light rays out so that the focal point moves towards the back of the eye. A concave lens is used to correct this.

Question 14

Farsightedness

Answer 14

When the cornea of your eye is under curved or your eyeball is too short.

To correct farsightedness, you have to bend the light rays in so that focal point moves towards the front of the eye. A convex lens is used correct this.

Question 15

Reflecting telescope

Answer 15

A reflecting telescope uses one convex lens and two mirrors to focus the light, light travels into the telescope and is reflected off of a concave mirror, converging before hitting the plane mirror at an angle and refracting through a convex lens eyepiece.

Question 16

Refracting telescope

Answer 16

The refracting telescope uses two convex lenses to refract the light rays to converge together. Both use convex lenses but a reflecting telescope uses convex mirrors and plane mirrors to reflect the light.