Worksheet
Plane Mirror Reflections
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Refer to the following information for the next five questions.
Match the correct definition to each word.
θ
i
= θ
r
produces diffuse reflections when the difference in successive elevations is greater than or equal to 1/8
th
of the incident wavelength
an image which is "trapped" inside a mirror that is formed by our eyes when they "dot back" the diverging rays that are reflected by a mirror.
d
i
= -d
o
rays that spread apart from each other
1. Law of Plane Mirrors
A
B
C
D
E
2. Law of Reflection
A
B
C
D
E
3. rough surface
A
B
C
D
E
4. diverging rays
A
B
C
D
E
5. virtual image
A
B
C
D
E
Refer to the following information for the next nine questions.
Law of Reflection
reflected wavefront
A
B
C
D
E
F
incident ray
A
B
C
D
E
F
interface
A
B
C
D
E
F
normal
A
B
C
D
E
F
angle of reflection
CPE
DPE
FPD
CPF
What is the size of the angle between any ray and its wavefront?
What is the size of the angle between any normal and its interface?
What is the relationship between the angle of incidence and the angle of reflection?
True or False
? Diffuse reflections obey the Law of Reflection?
True
False
Refer to the following information for the next two questions.
Mirror #1 is located at (-4,0) and mirror #2 is located at (2,0). Point P is at the origin, (0,0).
What are the coordinates of P
2
?
What are the coordinates of P
21
?
Refer to the following information for the next two questions.
Who can A see?
A
B
C
D
E
F
Who can't B see?
A
B
C
D
E
F
Two plane mirrors form the legs of a 60º angle. When an object is placed between these two mirrors, what is the maximum number of images that could be viewed while looking into the mirrors?
What is the minimum length of a plane mirror required for someone to see their entire body WITHOUT moving their head?
Which of the following are properties of virtual images formed by plane mirrors?
they are inverted
they are upright
they are left-left and right-right consistent
they are left-right reversed
they are enlarged in size
they are equal in size to the object
they are reduced in size
they are located closer to the back of the mirror than the object is in front of the mirror
they are located as far behind the mirror as the object is in front of the mirror
their frequencies (colors) remain the same
their frequencies (colors) are reversed with their complementary colors
they are formed by converging rays
they are formed by diverging rays
they are considered "cool images"
they are considered "hot images"
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