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Unit 6: Waves
6.3 Light and Sound Waves
6.3.1 Reflection of Waves
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Cards (27)
What is reflection in waves?
Waves bounce back
According to the Law of Reflection, the angle of incidence equals the angle of
reflection
The incident ray, reflected ray, and
normal
all lie in the same plane.
What type of reflection occurs on smooth surfaces?
Specular
Specular reflection maintains a clear reflected
image
Diffuse reflection
scatters
light from rough surfaces.
Match the type of reflection with its surface type and image quality:
Specular ↔️ Smooth, Clear
Diffuse ↔️ Rough, Scattered
What is the mathematical relationship between the angle of incidence and the angle of reflection?
\theta_{i} = \theta_{r}</latex>
Specular reflection is commonly seen in
mirrors
Diffuse reflection occurs on rough
walls
.
What type of surface is required for specular reflection?
Smooth
Specular reflection produces a clear reflected
image
What does the symbol
θ
r
\theta_{r}
θ
r
represent in reflection?
Angle of reflection
The incident ray, reflected ray, and
normal
all lie in the same plane.
Specular reflection occurs on
smooth
surfaces.
What type of image is produced by diffuse reflection?
Scattered
The angle of incidence equals the angle of reflection in
specular reflection
.
Diffuse reflection occurs on
rough
surfaces.
Which type of reflection is demonstrated by a mirror?
Specular
Specular reflection
produces a clear image.
Match the type of reflection with its characteristics:
Specular ↔️ Smooth surface, clear image
Diffuse ↔️ Rough surface, scattered image
What type of surface scatters light to prevent a clear image?
Rough
The two laws of reflection apply to
light waves
.
What is the relationship between the angle of incidence and the angle of reflection in light waves?
They are equal
Sound waves are reflected when they bounce back from a
surface
or barrier.
Specular reflection of sound waves occurs on smooth surfaces, maintaining their
direction
.
What type of reflection is used in padded walls to reduce echoes?
Diffuse