Worksheet:
Chapter 14
Three polarizing filters are placed in front of a 10W light source, as shown below.
Filter A has its polarizing axis
oriented horizontally.
Filter B has its polarizing axis oriented at an angle of 40 to the horizontal.
Filter C has its
polarizing axis oriented vertically.
1)
What is the intensity of the light as it enters filter A?
2.21 W/m
2
2)
What is the intensity of the light as it leaves filter A?
1.11 W/m
2
3)
What is the intensity of the light as it enters filter B?
0.328 W/m
2
4)
What is the intensity of the light as it leaves filter B?
0.193 W/m
2
5)
What is the intensity of the light as it enters filter C?
0.0912 W/m
2
6)
What is the intensity of the light as it leaves filter C?
0.0377 W/m
2
A 5cm candle is placed 50 cm in front of a plane mirror.
7)
What is the image distance?
50 cm
8)
How far is the object from the image?
100 cm
9)
Describe the image.
(Is it real or virtual?
Is it inverted or upright?
How tall is it?)
upright, virtual image; height = 5 cm
10)
What is the magnification?
M = 1.00
A 5cm candle is placed 50 cm in front of a converging mirror with a focal length of 30 cm.
11)
What is the image distance?
75 cm
12)
Describe the image.
inverted, real image; height = 7.5 cm
13)
What is the magnification?
M = 1.50
A 5cm candle is placed 60 cm in front of a converging mirror with a focal length of 30 cm.
14)
What is the image distance?
60 cm
15)
Describe the image.
inverted, real image; height = 5 cm
16)
What is the magnification?
M = 1.00
A 5cm candle is placed 20 cm in front of a converging mirror with a focal length of 30 cm.
17)
What is the image distance?
60.0 cm
18)
Describe the image.
upright, virtual image; height = 15 cm
19)
What is the magnification?
M = 3.0
60 cm
50 cm
50 cm
A
B
C
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A 5cm candle is placed 50 cm in front of a diverging mirror with a focal length of 30 cm.
20)
What is the image distance?
18.8 cm
21)
Describe the image.
upright, virtual image; height = 1.88 cm
22)
What is the magnification?
M = 0.375
A 5cm candle is placed in front of a mirror with a focal length of 30 cm.
23)
If the mirror forms an upright image that is 4cm tall, (a) what type of mirror is it? (b) how far is the candle from the
mirror? (c) how far is the image from the mirror?
diverging mirror; d
o
= 7.5 cm; d
i
= 6.0 cm
24)
If the mirror forms an inverted image that is 4cm tall, (a) what type of mirror is it? (b) how far is the candle from the
mirror? (c) how far is the image from the mirror?
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 Spring '09
 Ramesh
 Physics, Work, Light

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