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Optics

Total questions: 120

Worksheet time: 3hrs 21mins

Name
Class
Date
1.
What is the impact of myopia and hyperopia on daily life and activities?
a)
They can cause complete loss of vision.
b)
They can make it difficult to see objects clearly at certain distances.
c)
They have no impact on daily life and activities.
d)
They can improve vision at all distances.
2.
What is the definition of myopia?
a)
The inability to see distant objects clearly while close objects are clear.
b)
The inability to see close objects clearly while distant objects are clear.
c)
The ability to see both distant and close objects clearly.
d)
The inability to see any objects clearly.
3.
What is the relationship between lens strength and eye length in myopia?
a)
Lens strength and eye length are inversely proportional.
b)
Lens strength and eye length are directly proportional.
c)
Lens strength and eye length are equal.
d)
Lens strength and eye length have no relationship.
4.
What is the treatment plan for myopia based on?
a)
Lens strength and eye health.
b)
Lens strength and eye length.
c)
Lens strength and eye color.
d)
Lens strength and eye shape.
5.
What is the cause of myopia?
a)
Lens too weak or eye too short
b)
Lens too strong or eye too short
c)
Lens too weak or eye too long
d)
Lens too strong or eye too long
6.
How does a converging lens correct hyperopia?
a)
It corrects the shape of the eye.
b)
It has no effect on the eye.
c)
It increases the power of the eye.
d)
It decreases the power of the eye.
7.
What is the effect of hyperopia on distant objects?
a)
The eye does not allow any light rays to enter, causing a complete loss of vision.
b)
The eye diverges rays away from the retina, causing a clear image.
c)
The eye does not converge sufficient rays to make the rays meet on the retina, causing a blurred image.
d)
The eye converges sufficient rays to make the rays meet on the retina, causing a clear image.
8.
What is the significance of the near point in hyperopia treatment?
a)
The near point is the distance at which hyperopia is diagnosed.
b)
The near point is the distance at which hyperopia is corrected.
c)
The near point is the distance at which hyperopia is least severe.
d)
The near point is the distance at which hyperopia is most severe.
9.
What is the treatment for hyperopia?
a)
Correction using a diverging lens.
b)
Correction using a converging lens.
c)
Surgery to shorten the eye.
d)
No treatment is available.
10.
How do light rays contribute to blurred vision in myopia?
a)
They diverge away from the retina, causing a clear image.
b)
They do not reach the retina, causing a blurred image.
c)
They converge onto the retina, causing a clear image.
d)
They cross in front of the retina, causing a blurred image.
11.
How does hyperopia affect close objects?
a)
The eye converges sufficient rays to make the rays meet on the retina, causing a clear image.
b)
The eye does not allow any light rays to enter, causing a complete loss of vision.
c)
The eye does not converge sufficient rays to make the rays meet on the retina, causing a blurred image.
d)
The eye diverges rays away from the retina, causing a clear image.
12.
What is the near point of the eye?
a)
The distance at which the eye can see clearly.
b)
The distance at which the eye can see objects with the most detail.
c)
The distance at which the eye can see objects most clearly.
d)
The distance at which the eye can see objects least clearly.
13.
What is the treatment for myopia?
a)
Correction using a converging lens.
b)
Correction using a diverging lens.
c)
Surgery to lengthen the eye.
d)
No treatment is available.
14.
What is the effect of myopia on distant objects?
a)
The light rays diverge away from the retina, causing a clear image.
b)
The light rays converge onto the retina, causing a clear image.
c)
The light rays do not reach the retina, causing a blurred image.
d)
The light rays cross in front of the retina, causing a blurred image.
15.

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

a)

Concave

b)

Convex

c)

Objective

d)

Ocular

16.

When light passes through a convex lens, it does this.....

a)

Diverge, or spread apart

b)

Converge, or come together

c)

Reflect, or bounce off

d)

Create a rainbow

17.

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

a)

The Horizon Point

b)

The Point Break

c)

The Focal Point

d)

The Perspective

18.

When light waves move from passing through air to passing through a glass lens when happens to them?

a)

They slow down and change direction

b)

They speed up and change direction

c)

They maintain the same speed and change direction

d)

They maintain their same speed and direction

19.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

20.

The angle of the incoming rays of light are also called the.....

a)

Angle of reflection

b)

Angle of refraction

c)

Angle of incidence

d)

Wave angle

21.

The distance between a convex lens and its focal point is called what?

a)

The focus

b)

The focal length

c)

The wave length

d)

The amplitude

22.

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

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

23.

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

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

24.

As light passes from air into water it ________________________.

a)

speeds up

b)

continues at the same speed

c)

slows down

d)

forms a mirage

25.

Which lens is concave?

a)

a

b)

b

26.

Which lens can produce a real image?

a)

a

b)

b

27.

Which lens always produces an image that is upright?

a)

a

b)

b

28.

Which lens is the type of lens that is used in a hand lens?

a)

a

b)

b

29.

The best definition of refraction is ____.

a)

passing through a boundary

b)

bouncing off a boundary

c)

changing speed at a boundary

d)

changing direction when crossing a boundary

30.
Which color is good absorber of heat?
a)
Black
b)
Yellow
c)
White
31.
How much time does sunlight take to reach from sun to earth?
a)
8 sec
b)
8 min
c)
8 hour
d)
1 min
32.
A car has a convex mirror as its side mirror of focal length 30 cm. A second car is 5m behind the first car. Find the position of the second car as seen in the mirror of first car.
a)
0.32 m
b)
0.28 m
c)
0.64 m
d)
0.78 m
33.
A man uses lens of power +2.0 D in his spectacles. His son takes out the lens from the spectacles and keeps it between a small pencil and a wall. He observes an inverted image on the wall, which has the same size as the pencil.
a)
50 cm
b)
75 cm
c)
100 cm
d)
150 cm
34.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
35.

We combine two lenses, one is convex and other is concave having focal lengths /, and f2 and their combined focal length is F. Combination of the lenses will behave like concave lens, if

a)

f1 > f2

b)

f1 = f2

c)

f1 < f2.

d)

f1 ≤ f2

36.

A convex lens and a concave lens, each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power of the combination (in dioptres) is

a)

zero

b)

25

c)

50

d)

infinity

37.

Which of the following statements is true ?

a)

A convex lens has 4 dioptre power having a focal length 0.25 m

b)

A convex lens has -4 dioptre power having a focal length 0.25 m

c)

A concave lens has 4 dioptre power having a focal length 0.25 m

d)

A concave lens has -4 dioptre power having a focal length 0.25 m.

38.

A convex and a concave lens of equal focal length behaves as a regular glass slab receiving light normally.

a)

True

b)

False

39.

A convex lens of refractive index 3/2 has a power of 2.5 D in air. If it is placed in a liquid of refractive index 2 then the new power of the lens is

a)

– 1.25 D

b)

– 1.5 D

c)

1.25 D

d)

1.5 D

40.

The focal length of a biconvex lens of radii of each surface 50 cm and refractive index 1.5, is

a)

40.4 cm

b)

75 cm

c)

50 cm

d)

80 cm

41.

If magnification is less than one (m<1) then the size of the image is

a)

Enlarged

b)

Diminished

c)

Same size as object

42.

The power of a lens is -5D. Find its focal length

a)

20 cm

b)

20 m

c)

-20cm

d)

-20mm

43.

A 6cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 25 cm. The object distance is 40 cm, find the image distance and magnification.

a)

V= 200/3 cm

b)

V= 400/13 cm

c)

m= 10 cm

d)

m= -10 cm

44.

The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be placed from the lens? What is the nature of the image at a distance of 80 cm and the lens?

a)

f = 40 cm .

The lens is convex and image formed at 80 cm from the lens is real and inverted.

b)

f = 20 cm .

The lens is concave and image formed at 80 cm from the lens is real and inverted.

c)

f = 20 cm .

The lens is convex and image formed at 80 cm from the lens is real and inverted.

d)

f = 40 cm .

The lens is concave and image formed at 80 cm from the lens is real and inverted.

45.

The unit of Power of a lens

a)

Dioptre

b)

Meter

c)

Kilogram

d)

Newton

46.

The power of a convex lens of focal length 50 cm is .

a)

+ 2D

b)

- 2D

c)

50 D

d)

- 5D

47.

The ratio of height of image to height of the object is

a)

Magnification

b)

Power of a lens

c)

Lateral displacement

d)

Focal length

48.

Power of the convex lens having a focal length 25cm is:

a)

4D

b)

0.2D

c)

2.5D

d)

40D

49.

Where should an object be placed in front of a convex lens to get a real image of the size of the object?

a)

At infinity

b)

At twice the focal length

c)

At principal focus of the lens

d)

None

50.

The distance between a convex lens and its focal point is called what?

a)

The focus

b)

The focal length

c)

The wave length

d)

The amplitude

51.

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

a)

Shorter

b)

Longer

c)

Thicker

d)

Thinner

52.
A man uses lens of power +2.0 D in his spectacles. His son takes out the lens from the spectacles and keeps it between a small pencil and a wall. He observes an inverted image on the wall, which has the same size as the pencil.
a)
50 cm
b)
75 cm
c)
100 cm
d)
150 cm
53.

The power of a lens is positive for a ...

a)

Concave (Diverging) Lens

b)

Convex (Converging) Lens

54.

Calculate the power of a concave lens of focal length 60 cm

a)

−1.67 m−1-1.67\ m^{-1}

b)

+1.67 m−1+1.67\ m^{-1}

c)

−1.67 cm−1-1.67\ cm^{-1}

d)

+ 1.67 cm−1+\ 1.67\ cm^{-1}

55.

A lens has a power of 12 m-1. Calculate its focal length

a)

8.33 cm

b)

12.45 cm

c)

0.8 m

d)

7.5 cm

56.

A diverging lens has a power of

− 0.025 m−1-\ 0.025\ m^{-1} . Calculate its focal length.

a)

4 m

b)

40 m 

c)

0.4 m

d)

40 cm

57.

Two convex lenses of power  6 m−16\ m^{-1}   and  10 m−110\ m^{-1}   are placed in contact. Calculate the combined power and the focal length of the combination.

a)

P =16 m−1 , f = 6.25 cmP\ =16\ m^{-1}\ ,\ f\ =\ 6.25\ cm  

b)

P = − 16 m−1 , f = 6.25 cmP\ =\ -\ 16\ m^{-1}\ ,\ f\ =\ 6.25\ cm  

c)

P = 6 m−1 , f = 0.6 cmP\ =\ 6\ m^{-1}\ ,\ f\ =\ 0.6\ cm  

d)

P = −6 m−1 , f = 6 cmP\ =\ -6\ m^{-1\ },\ f\ =\ 6\ cm  

58.

A combination of two convex lenses has a focal length of 20 cm. If the focal length of one of the lenses is 60 cm, what is the focal length of the other?

a)

30 cm

b)

40 cm

c)

20 cm

d)

60 cm

59.

A myopia patient has a far point of 10 m. What is the lens power to help him seeing distant objects clearly as normal people do?

a)

1 D

b)

0.5 D

c)

0.25 D

d)

0.2 D

e)

0.1 D

60.

A hyperopia patient's near point is 100 cm. What is the lens power needed to help him seeing objects clearly from 20 cm distance?

a)

5 D

b)

4 D

c)

3 D

d)

2 D

e)

1 D

61.

The normal eyes (emetrop) have the near point at .... and far point at ....

a)

infinty and 25 cm

b)

25 cm and infinty

c)

25 cm and 250 cm

d)

intinity and infinity

e)

50 cm and infinity

62.

The farthest point of an object that is still be seen clearly by our eyes without accommodation is called ....

a)

myopia

b)

punctum remotum

c)

punctum proximum

d)

punctum minimum

e)

punctum maximum

63.

Joe is making a headlamp for her motorcycle and needs a mirror that will reflect light from the headlamp's bulb in one direction.

Which of the following mirrors should Joe use in the headlamp?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
64.

Don is in charge of installing mirrors in a hospital hallway at all the corners so that nurses get a wide view of incoming people while moving patients.

Which of the following should Don use as a hallway safety mirror?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
65.

Rob wants to design a solar furnace that will focus sunlight at one spot to heat water.

Which of the following mirrors should Rob use in the solar furnace?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
66.

Miranda wants to design a powerful flashlight and needs a mirror that will reflect light from the flashlight bulb in one direction.

Which of the following mirrors should Miranda use in the flashlight?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
67.

Beth needs to install a parking mirror at the turn of a road for drivers to get a wide view of incoming traffic.

Which of the following should Beth use as a parking mirror?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
68.

Sarah has built a microscope but needs to design a mirror to illuminate her slides by focussing light from a distant bulb on the instrument.

Which of the following mirrors should Sarah use in the microscope?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
69.

Mike owns a shop and needs a security mirror to avoid shoplifters.

Which of the following should Don use as security mirror?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
70.

Amanda wants to see her own reflection in the morning before going to work.

Which of the following mirrors should Amanda use in her bedroom?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
71.

Lauren is a dentist and requires a mirror to see teeth and other areas in mouth of her patients. Consider that inside a patient's mouth, the objects are very close to the mirror.

Which of the following mirrors should Lauren use?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
72.

Robbie works in a shop where many items are sold, including sunglasses. Customers often want to try them on but cannot see how they look. Robbie needs to tell the manager to buy one.

Which of the following mirrors should Robbie recommend?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

a)
b)
c)
d)
73.
A cut piece of clear glass or plastic in the form of a triangle or other geometric shape.
a)
Person
b)
Prison
c)
Prism
d)
Preacher
74.
The bending of waves as they pass from one substance into another.
a)
Reaction
b)
Reflection
c)
Refraction
d)
Repost
75.
Band of color in a rainbow, or from a light passing through a prism.
a)
Spectrum
b)
Space
c)
Prism
d)
Refraction
76.
The term for any wave that hits a surface and bounces off
a)
Transparent
b)
Translucent
c)
Refraction
d)
Reflection
77.
What colors are in the rainbow?
a)
Red,orange,yellow,green,blue,indigo,purple
b)
Red,orange,yellow,green,blue,purple
c)
red,orange,orange,yellow,blue,purple
d)
red,orange,yellow,green,blue,blue,purple
78.
Are rainbows real?
a)
know
b)
Maybe
c)
no
d)
Yes
79.
Are unicorns real?
a)
Some people think so
b)
Yes
80.
Rainbows are often seen
a)
after a rainstorm
b)
before a rainstorm
c)
after the sun sets at night
d)
before a storm
81.
Rainbows are produced when
a)
light exits many raindrops at different angles
b)
the sun causes a rainstorm
c)
the spectrum causes a rainstorm
d)
the sun comes out after a storm
82.
What color is NOT in a rainbow
a)
yellow
b)
indigo
c)
orange
d)
pink
83.

Image behind the mirror is

a)

virtual

b)

real

c)

upside down

d)

upright

84.

Image behind the mirror is

a)

virtual

b)

real

c)

upside down

d)

upright

85.

this type of mirror is used in supermarkets to see around bends

a)

concave

b)

convex

c)

plane

d)

window

86.

A flat mirror is an example of a ___.

a)

plane mirror

b)

concave mirror

c)

convex mirror

d)

spherical mirror

87.

What type of lens creates the image seen in the eyeglasses?

a)

convex

b)

concave

c)

reflection

d)

plane

88.

A lens that is thicker in the middle than on the outside is called ___.

a)

diverging

b)

concave

c)

convex

d)

achromatic

89.

A lens that is thinner in the middle than on the outside is called ___.

a)

diverging

b)

concave

c)

convex

d)

achromatic

90.

What word means to bend light rays away from each other?

a)

Converging light

b)

Diverging light

c)

Virtual Light

d)

Real Light

91.

What word means to bend light rays toward each other?

a)

Converging light

b)

Diverging light

c)

Virtual Light

d)

Real Light

92.

A dentist uses a small dental mirror to help magnify teeth in your mouth. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

93.

The side view mirrors on your car help shrink the image on both sides of the car, allowing you to see a larger field of view. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

94.

This image is showing a convex mirror because the image is (choose 2 answers)

a)

rays meeting behind the mirror

b)

rays meeting behind the mirror

c)

image is real

d)

image is virtual

95.
The following is a picture of what type of mirror? 
a)
Convex (diverging) Mirror
b)
Concave (converging) Mirror
c)
Plane Mirror
d)
Flat Mirror
96.
The following is a picture of what type of mirror? 
a)
Convex (diverging) mirror
b)
Concave (converging) mirror
c)
Plane Mirror
d)
Flat Mirror
97.
An image that you can see when you look into a mirror, but does not really exist is called which of the following?
a)
Real Image
b)
Fake Image
c)
Virtual Image
d)
Digital Image
98.

A student is conducting an experiment with four different types of mirrors. Which mirror in the experiment is a convex mirror?

a)

mirror 1

b)

mirror 2

c)

mirror 3

d)

mirror 4

99.
This image is...
a)
Inverted and smaller
b)
Inverted and larger
c)
not inverted and smaller
d)
not inverted and larger
100.
Convex Mirrors produce...
a)
only virtual images
b)
virtual or real images
c)
only real images
d)
inverted images
101.
a real image...
a)
is produced by virtual rays and can be projected on a screen
b)
is produced by real rays and cannot be projected on a screen
c)
is produced by virtual images and cannot be projected on a screen
d)
is produced by real rays and can be projected on a screen
102.
What does The law of reflection state?
a)
the angle the incident ray makes with a line drawn perpendicular to the surface of the mirror.
b)
shows how rays change direction when they strike mirrors and pass through lenses.
c)
The angle of reflection is equal to the angle of incidence.
103.

Mirrors used for illuminating purposes such as headlights of cars, flashlights, and spotlights.

a)

concave

b)

convex

104.

A mirror that always produces reduced and virtual image

a)

concave

b)

convex

105.

A mirror that produces upright and enlarged image when the object is very near

a)

concave

b)

convex

106.
a)

Virtual, 5.45 cm behind mirror

b)

Real, 5.45 cm in front of mirror

c)

Virtual, 3.25 cm behind mirror

d)

Real, 5 cm behind mirror

107.
a)

8.57 cm, virtual, m = 0.29

b)

8.6 cm, real, m = 2

c)

8.5 cm, virtual, m = 0.5

d)

8.45 cm, virtual, m = 0.3

108.
a)

u = 20 cm, v = 9.5 cm

b)

u = 30 cm, v = 10 cm

c)

u = 25 cm, v = 8 cm

d)

u = 30 cm, v = 7.5 cm

109.
a)

16.50 cm

b)

16.42 cm

c)

16.67 cm

d)

16.30 cm

110.
a)

10 cm

b)

13 cm

c)

14 cm

d)

12 cm

111.
a)

60 cm

b)

40 cm

c)

50 cm

d)

30 cm

112.
a)

35 cm

b)

40 cm

c)

45 cm

d)

50 cm

113.

The object distance must equal:

a)

The focal length

b)

Half the focal length

c)

Double the focal length

d)

Not possible.

114.

This image is showing a convex mirror because the image is (choose 2 answers)

a)

rays meeting behind the mirror

b)

rays meeting behind the mirror

c)

image is real

d)

image is virtual

115.

In the image, all the rays meet at F, What is F

a)

focal length

b)

focal point

c)

center of curvature

d)

reflection

116.

what is A on the diagram?

a)

center of curviture

b)

focal length

c)

reflected ray

d)

focal point

117.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

118.

image above the principal axis (PA) is

a)

virtual

b)

real

c)

upright

d)

upside down

119.

The 2 reflected rays that meet.

a)

ray of incident

b)

reflected image is produced

c)

focal point

d)

image is not produced

120.

A student is conducting an experiment with four different types of mirrors. Which mirror in the experiment is a convex mirror?

a)

mirror 1

b)

mirror 2

c)

mirror 3

d)

mirror 4

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Worksheet

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