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Light, Lens and Mirror 1

Total questions: 70

Worksheet time: 2hrs 45mins

Name
Class
Date
1.
A ray of light is reflected by two parallel plane mirrors X and Y.  Which statement is correct? 
a)
The angle of incidence at mirror X is 30°.
b)
The angle of incidence at mirror Y is 60°.
c)
The angle of reflection at mirror X is 120°.
d)
The angle of reflection at mirror Y is 0°. 
2.
An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram? 
a)
A
b)
B
c)
C
d)
D
3.
The diagram shows a ray of light from one point on a lamp striking a plane mirror. The image of the point on the lamp formed by the mirror is 
a)
at P and is real.
b)
at P and is virtual.
c)
at R and is real.
d)
at R and is virtual. 
4.

Light is an example of a transverse wave

a)

True

b)

False

5.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
6.

If a capital letter R is seen in an ordinary mirror, what does it look like?

a)

A

b)

B

c)

C

d)

D

7.

When light passes from air to water, what happens to the speed of the light?

a)

speeds up

b)

slows down

c)

stays the same

8.

State the characteristics of image of plane mirror

a)

same size

b)

virtual

c)

real

d)

upright

9.

The Diagram shows image of wall clock in a plane mirror. What is the actual time on the clock?

a)

5.15

b)

7.15

c)

7.45

d)

8.45

10.

The diagram shows a man stand in front of a lane mirror. State the distance between the pot and the image of the man.

a)

5 m

b)

8 m

c)

9 m

d)

10 m

11.

The diagram shows a reflection of light. Which statement is correct?

a)

incident angle= a

reflected angle= d

b)

incident angle= b

reflected angle= c

c)

incident angle= c

reflected angle= b

d)

incident angle= d

reflected angle= a

12.
The diagram shows the image of a clock in a plane mirror. What time is shown?
a)
02:25 
b)
02:35 
c)
09:25 
d)
09:35 
13.
 A parallel beam of light falls on a converging lens. Which diagram shows what happens to the beam of light? 
a)
A
b)
B
c)
C
d)
D
14.
An object 5.0 cm high is placed 2.0 cm from a converging (convex) lens which is being used as a magnifying glass. The image produced is 6.0 cm from the lens and is 15 cm high.
What is the focal length of the lens? 
a)
2.0cm
b)
3.0cm
c)
4.0cm
d)
6.0cm 
15.

Which length is the focal length of the lens?

a)

A

b)

B

c)

C

d)

D

16.

A lens is used to produce a magnified image, as shown in the scale diagram.

What is the linear magnification of the object?

a)

0.33

b)

3.0

c)

4.0

d)

6.0

17.

The ray diagram shows two rays from a point on an object placed in front of a diverging (concave) lens.

What are the properties of the image produced? 

a)

real and larger than the object

b)

real and smaller than the object

c)

virtual and larger than the object

d)

virtual and smaller than the object

18.

An object is viewed through a concave (diverging) lens.

What is the correct description of the image formed?

a)

real, inverted, magnified

b)

real, upright, diminished

c)

virtual, inverted, magnified

d)

virtual, upright, diminished

19.

Convex lenses are used in cameras and as magnifying glasses.

Which types of image are formed?

a)

A

b)

B

c)

C

d)

D

20.

An object is placed in front of a diverging lens as shown on the scale diagram.

The principal focus F is marked on each side of the lens.

What is the position of the image formed by the lens?

a)

A

b)

B

c)

C

d)

D

21.

A lens forms a blurred image of an object on a screen.

How can the image be made sharp and in focus on the screen?

a)

by moving the object away from the lens and screen

b)

by moving the screen away from the lens and object

c)

by using a brighter object at the same position

d)

by using a lens of longer focal length at the same position

22.

The human eye has a converging lens system that produces an image at the back of the eye.

An eye views a distant object. What type of image is produced?

a)

real, erect, same size

b)

real, inverted, diminished

c)

virtual, erect, diminished

d)

virtual, inverted, magnified

23.
When light bounces back it is _____
a)
Reflected
b)
Refracted
c)
Absorbed
d)
Optical Density
24.

In the diagram, which letter represents the angle of incidence?

a)

A

b)

B

c)

C

d)

D

25.
The imaginary line perpendicular to a reflecting surface is called _____.
a)
crooked line
b)
parallel line
c)
angular line
d)
normal line
26.

This image is.....

a)

inverted and smaller

b)

inverted and larger

c)

not inverted and smaller

d)

not inverted and larger

27.

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

28.
Which describes a convex lens?
a)
triangular in shape
b)
more transparent in the middle
c)
thicker on the edges than in the middle
d)
thicker in the middle than on the edges
29.

Choose all daily applications of the convex lens.

a)
b)
c)
d)
e)
30.

Choose all the correct nature of the image.

a)

erect

b)

inverted

c)

magnified

d)

virtual

31.

The image will ...

a)

be inverted and real

b)

be formed at inifinity

c)

be erect and virtual

d)

be inverted and virtual

32.

This real image is.....

(hints: ________ and __________)

(a)  

33.
This image is...
a)
Inverted and smaller
b)
inverted and bigger
c)
not inverted and smaller
d)
not inverted and bigger
34.
If an object's distance from a convex lens were increased, the image would become which of the following?
a)
Larger and virtual
b)
Larger, only
c)
Smaller, only
d)
Smaller and virtual
35.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

36.

Image behind the mirror is

a)

virtual

b)

real

c)

upside down

d)

upright

37.

The size of an object and its image are the same in this type of mirror...

a)

Plane

b)

Convex

c)

Concave

38.

In the given ray diagram, image distance is

a)

negative

b)

positive

c)

can't say

d)

information can't be derived from figure

39.

A concave mirror has a 7 cm focal length. You place a 2.4 cm tall object 16 cm from the mirror. Determine the image height.

HINT. use:   xi=fxoxo−f      and:        hiho=−xixo      HINT.\ use:\ \ \ x_i=\frac{fx_o}{x_o-f}\ \ \ \ \ \ and:\ \ \ \ \ \ \ \ \frac{h_i}{h_o}=-\frac{x_i}{x_o}\ \ \ \ \ \  

a)

7 cm

b)

4 cm

c)

-1.9 cm

d)

-3.5 cm

40.

A concave mirror has a radius of curvature of 24 cm. A 6.4 cm tall object is held 26cm from the mirror. Calculate the distance between the image and the mirror.

HINT. use: f=r2        xi=fxoxo−fHINT.\ use:\ f=\frac{r}{2}\ \ \ \ \ \ \ \ x_i=\frac{fx_o}{x_o-f}  

a)

22.3 cm

b)

23.2 cm

c)

32.2 cm

d)

23.3 cm

41.

A concave mirror has a focal length of 12 cm. A 6.4 cm tall object is held 26cm from the mirror. The distance from the image to the object is 22.3 cm. What is the height of the image.

HINT. use: hiho=−xixoHINT.\ use:\ \frac{h_i}{h_o}=-\frac{x_i}{x_o}  

a)

-5.5 cm

b)

3.3 cm

c)

5.5 cm

d)

-3.3 cm

42.

When an object is placed on the focal point in front of a converging lens, the image produced is ___.

a)

real, reduced, and inverted

b)

real, enlarged, and inverted

c)

real, true, and inverted

d)

There is no image

43.

A tree is located 40 m from the converging lens of focal length 0.08 m. What does the 0.08 m represent?

a)

do

b)

di

c)

f

d)

1/f

44.
If the distance of the image from the lens (di) is positive. The image is considered....
a)
Real 
b)
Virtual
45.

Where can you place an object in order to get an image of the same size as the object? Select all that apply.

a)

beyond 2F

b)

at 2F

c)

between F & 2F

d)

at F

e)

between F and the lens

46.

Where can you place an object in order to get a smaller image than the object? Select all that apply.

a)

beyond 2F

b)

at 2F

c)

between F & 2F

d)

at F

e)

between F and the lens

47.
A converging lens produces an image twice the size of the original. If the object is placed 0.40 m from the lens, and the image produced is 0.80 m from the lens. What is the focal length of the lens? 
a)
0.351 m
b)
0.267 m
c)
0.416 m
d)
0.112 m
48.
A normal human eye has a focal length of about 0.023 m. If you look at the tip of a pencil, 0.553 m from your eye, how far is the image from the lens of your eye? 
a)
0.024 m
b)
0.033 m
c)
0.045
d)
0.055
49.

Where can you place an object in order to get a real image? Select all that apply.

a)

beyond 2F

b)

at 2F

c)

between F & 2F

d)

at F

e)

between F and the lens

50.
The hi in this picture is negative.
a)
True
b)
False
51.
The di will always be positive with a converging lens.
a)
True
b)
False
52.
The di for a virtual image will have a ______ value.
a)
positive
b)
negative
53.
The do can be a negative value.
a)
True
b)
False
54.
The di for a real image will be a _________________ value
a)
positive
b)
negative
55.
The do will be a _________________ value.
a)
positive
b)
negative
56.

Which diagram shows how a ray of light could pass through a glass block in air?

a)
b)
c)
d)
57.

A student draws three rays of light from point P through a converging lens. Each point labelled F is a principle focus of the lens. Which of the rays are drawn correctly?

a)

ray Y only

b)

ray Z only

c)

ray X and ray Y

d)

ray X and ray Z

58.

The image formed by a plane mirror is upright. What are the other characteristics of the image?

a)

magnified and virtual

b)

laterally (left to right) inverted

c)

laterally (left to right) inverted and virtual

d)

laterally (left to right) inverted and magnified

59.

Type of image formed in the diagram

a)

real image

b)

virtual image

60.

In which of the diagrams is the path of the light ray not correct?

a)

A

b)

B

c)

C

d)

D

61.

An object is placed in front of a diverging lens as shown on the scale diagram.

The principal focus F is marked on each side of the lens.

What is the position of the image formed by the lens?

a)

A

b)

B

c)

C

d)

D

62.

Convex lenses are used in cameras and as magnifying glasses.

Which types of image are formed?

a)

A

b)

B

c)

C

d)

D

63.

An object is viewed through a concave (diverging) lens.

What is the correct description of the image formed?

a)

real, inverted, magnified

b)

real, upright, diminished

c)

virtual, inverted, magnified

d)

virtual, upright, diminished

64.

The ray diagram shows two rays from a point on an object placed in front of a diverging (concave) lens.

What are the properties of the image produced? 

a)

real and larger than the object

b)

real and smaller than the object

c)

virtual and larger than the object

d)

virtual and smaller than the object

65.

A lens is used to produce a magnified image, as shown in the scale diagram.

What is the linear magnification of the object?

a)

0.33

b)

3.0

c)

4.0

d)

6.0

66.

Which length is the focal length of the lens?

a)

A

b)

B

c)

C

d)

D

67.

Which of these provides the best explanation for why the pencil appears broken?

a)

The pencil absorbs the light rays that hit it.

b)

Water reflects light rays away from the pencil.

c)

Light rays are bent by the water in the glass.

d)

The surface of the water reflects the light rays.

68.

Is the image considered real or virtual?

a)

real (inverted)

b)

virtual (upright)

69.
Which window is opaque?
a)
Window 1
b)
Window 2
c)
Window 3
d)
None
70.

The radius of curvature of a convex lens is 20cm. What is its focal length?

a)

10 cm

b)

20 cm

c)

30 cm

d)

40 cm

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