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Phyisics
Paper 2
P6
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Created by
Husnaa Alhassan
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Cards (253)
What are the three possible outcomes when a wave arrives at a boundary between two materials?
Absorption, transmission,
reflection
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What happens to the energy of a wave when it is absorbed by a material?
It is transferred to the
material's energy stores
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What is the result of wave transmission at a boundary?
The wave enters the
material
and continues traveling
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What is the rule that governs the reflection of waves?
The
angle of incidence
equals the
angle of reflection
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If the angle of incidence is 30 degrees, what is the angle of reflection?
30
degrees
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What is the normal in a ray diagram?
A dashed line
perpendicular
to the surface
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Why is the normal important in drawing a ray diagram?
It helps measure the
angle of incidence
and reflection
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What is the point where the incoming ray touches the boundary called?
Point of incidence
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What is specular reflection?
Reflection from a
smooth
surface where all
normals
are aligned
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What is diffuse reflection?
Reflection from a
rough surface
where
normals
are scattered
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Why can't you see your reflection in a piece of paper?
Because paper causes
diffuse reflection
,
scattering
light in all directions
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What is the angle of incidence in a ray diagram?
The angle between the
incoming ray
and the
normal
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If the angle of incidence is 45 degrees, what is the angle of reflection?
45
degrees
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What determines whether a wave is reflected, absorbed, or transmitted at a boundary?
The
wavelength
of the wave and the properties of the
materials
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What is the angle of reflection in a ray diagram?
The angle between the reflected ray and the
normal
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Why does a mirror produce a clear image?
Because it causes
specular reflection
, reflecting light
uniformly
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How does the surface roughness affect the reflection of light?
Rough surfaces cause
diffuse reflection
, scattering light in different directions
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What is the angle between the normal and the surface in a ray diagram?
90
degrees
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If the angle of incidence is 60 degrees, what is the angle of reflection?
60
degrees
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What happens to the normals in diffuse reflection?
They point in different directions due to the
rough surface
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What is the angle of incidence equal to in reflection?
The
angle of reflection
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Why is the angle of incidence equal to the angle of reflection?
Because it is a
fundamental law of reflection
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If the angle of incidence is 75 degrees, what is the angle of reflection?
75
degrees
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What is the main difference between specular and diffuse reflection?
Specular reflection occurs on
smooth
surfaces, diffuse on rough surfaces
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What is the point of incidence in a ray diagram?
The point where the
incoming ray
touches the
boundary
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Why do rough surfaces scatter light in diffuse reflection?
Because the
normals
point in different directions due to
surface roughness
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If the angle of incidence is 15 degrees, what is the angle of reflection?
15
degrees
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What is the relationship between the angle of incidence and the angle of reflection?
They are always
equal
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What is the angle of reflection equal to in reflection?
The
angle of incidence
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Why is the normal perpendicular to the surface in a ray diagram?
Because it is used to measure the
angles of incidence and reflection
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If the angle of incidence is 50 degrees, what is the angle of reflection?
50
degrees
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What is the key difference between specular and diffuse reflection in terms of image formation?
Specular
reflection forms
clear
images,
diffuse
does not
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What is the angle of incidence measured between?
The
incoming ray
and the
normal
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Why does a rough surface like paper not produce a clear image?
Because it causes
diffuse reflection
,
scattering light
in all directions
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If the angle of incidence is 80 degrees, what is the angle of reflection?
80
degrees
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What is the role of the normal in determining the angle of reflection?
It
serves
as
a
reference line
to
measure
the
angles
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What is the angle of reflection measured between?
The
reflected ray
and the
normal
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Why is the angle of incidence always equal to the angle of reflection?
Because it is a
fundamental law of reflection
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If the angle of incidence is 10 degrees, what is the angle of reflection?
10 degrees
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What is the main reason for the difference between specular and diffuse reflection?
The smoothness or roughness of the
reflecting surface
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