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Electromagnetic Waves
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Created by
Jasmeet Kaur
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Cards (17)
What is the phenomenon called when light waves change direction as they pass from one medium to another?
Refraction
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Why do waves travel at different speeds in different materials?
Because different materials have different
densities
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How does the density of a material affect the speed of electromagnetic waves like light?
The
higher
the density of the material, the
slower
the wave will travel through it
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What happens to a light wave when it travels from air into glass?
It
slows down
and bends towards the
normal
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What is the normal line in the context of refraction?
The
normal
is a dashed line
perpendicular
to the surface at the point of incidence
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What occurs when a wave hits the boundary between two materials at an angle?
The wave will be
refracted
, changing its
direction
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In a ray diagram, what should be drawn first when illustrating the refraction of light through glass?
The
normal
line at the point of
incidence
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What is the
refracted
ray in a ray diagram?
The line that represents the
direction
of the wave after it has bent due to
refraction
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What happens to the direction of a light ray when it passes from a more dense medium to a less dense medium?
It
speeds up
and
bends away
from the normal
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What do we call the ray that emerges from the glass after refraction?
The emergent ray
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What must be included in a ray diagram for refraction?
The angle of
incidence
and the angle of
refraction
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According to the wave speed equation, what is the relationship between wave speed, frequency, and wavelength?
Wave speed
equals frequency
times
wavelength
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What happens to the frequency of a wave as it passes from one medium to another?
The frequency always stays the
same
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What changes when a wave's speed increases as it passes into a different medium?
The wavelength must
increase
as well
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How do different wavelengths of light behave when passing through a triangular prism?
They are refracted by
different
amounts, spreading out like a
rainbow
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What are the steps to draw a proper ray diagram for refraction through glass?
Draw the
normal
line at the point of
incidence.
Draw the incident ray.
Determine the direction of the
refracted
ray based on the density change.
Draw the refracted ray towards the
normal.
Repeat
for the emergent ray as it exits the glass.
Label the angles of
incidence
and
refraction.
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What are the key concepts related to the refraction of light waves?
Refraction occurs when light waves
change direction
at a
boundary.
Waves travel at
different speeds
in different mediums due to
density.
The normal line is
perpendicular
to the surface at the point of
incidence.
The speed of light changes, affecting
wavelength
but not
frequency.
Different wavelengths of light are
refracted
differently, creating a
spectrum.
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