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Light - Lenses and the Eye

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.
What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?
a)
optic nerve
b)
pupil
c)
cornea
d)
iris
2.
The two parts of the eye that refract light are the ______________.
a)
eyelid and eyebrow
b)
eyelid and lens
c)
cornea and retina
d)
cornea and lens
3.
A person who is farsighted can be assisted by_________________.
a)
lenses that are tinted lenses
b)
concave lenses that make light rays focus on the cornea
c)
convex lenses that make light rays converge farther toward the retina
d)
surgery that enlarges the pupil
4.
What part of the eye acts like a convex lens?
a)
pupil
b)
retina
c)
cornea
d)
eyelid
5.
For clear vision, an image must be focused exactly on the ________________.
a)
retina
b)
pupil
c)
optic nerve
d)
lens
6.
What is the order of the path of light in the human eye?
a)
cornea, pupil, lens, retina, optic nerve, brain
b)
 lens,cornea, pupil, retina, optic nerve, brain
c)
pupil, lens, retina, optic nerve, cornea, brain
d)
brain, pupil, lens, retina, optic nerve, cornea,
7.
A ___ lens makes objects appear bigger.
a)
concave
b)
convex
c)
prism
d)
flat
8.
A __ lens makes objects appear smaller and further away.
a)
convex
b)
concave
c)
prism
d)
flat
9.

What type of lens is wider in the middle than on the edges?

a)

Concave

b)

Convex

c)

Objective

d)

Ocular

10.

What type of lens is thinner in the middle than at the edges?

a)

Convex

b)

Concave

c)

Objective

d)

Magnifying

11.

When light passes through a convex lens, it_________.

a)

Diverges, or spreads apart

b)

Converges, or comes together

c)

Reflects, or bounces off

d)

Creates a rainbow

12.

The point at which light rays converge after passing through a convex lens is called __________.

a)

The Horizon Point

b)

The Point Break

c)

The Focal Point

d)

The Perspective

13.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

14.

The distance between a convex lens and its focal point is called_________

a)

The focus

b)

The focal length

c)

The wave length

d)

The amplitude

15.

The thicker the convex lens, the ___________________ its focal length.

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

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