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Science > Light and Optics > Flashcards

Light and Optics Flashcards

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1
Q

If you are nearsighted, your eyes are long or short?

A

Long

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2
Q

What is the part of the eye that connects to our brain?

A

Optic nerve

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2
Q

What is the part of the eye that shows us the colour of the eye and helps control the amount of light going into the eye?

A

The Iris

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3
Q

If you are farsighted, your eyes are long or short?

A

Short

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4
Q

What is the part of the eye that allows us to zoom in and out on objects?

A

The lens

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6
Q

What is the part of the eye that allows us to see colour?

A

The Retina

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7
Q

What is the part of the eye that allows animals to see in the dark?

A

The tapetum lucidum/reflective layer

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8
Q

What part of the eye helps protect the eye from infections and dirt?

A

The Cornea

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9
Q

What is the part of the eye that helps maintain the eye’s shape?

A

Vitreous humour

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10
Q

What part of the eye helps nourish the lens?

A

Aqueous humour

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11
Q

What is the part of the eye that helps provide structural strength and protection from the rupture of the eye?

A

The Sclera

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12
Q

What part of the eye helps focus light into the eye?

A

The Lens

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13
Q

How do we correct farsightedness?

A

We use Convex

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14
Q

What does it mean to be farsighted?

A

It means that you can only see things that are far away. Things nearby will be blurry.

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15
Q

What does it mean to be nearsighted?

A

It means that you can only see things that are nearby. Things far away will be blurry.

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16
Q

How do we correct nearsightedness

A

We use concave.

17
Q

Why is the blind spot in our eyes?

A

Because that is where the optic nerve is and that part of the eye has no light-sensitive cells.

18
Q

When nearsighted, the focal point goes behind or ahead of the retina?

A

Ahead

19
Q

Is the aqueous humour at the front or back at the eye?

A

The front, right ahead of the lens

20
Q

Is the vitreous humour at the front or back at the eye?

A

It takes up the back, behind the lens

21
Q

What is the focal point?

A

It is the point where the light rays meet after reflection and refraction.

22
Q

When farsighted, the focal point goes behind or ahead of the retina?

A

Behind

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