Electromagnetic Waves || with Right Answers.
wave correct answers A disturbance that transfers energy from place to place
medium correct answers The material through which a wave travels
vibrate correct answers to move in a repeated back-and-forth or up-and-down motion
electromagnetic wave correct answers a transverse wave that involves the transfer of electric and
magnetic energy
An electromagnetic wave is made up of... correct answers ...vibrating electric and magnetic
fields that move through space or some medium at the speed of light.
How is an electromagnetic wave formed? correct answers An electromagnetic wave can begin
with the movement of charged particles, all of which have electric fields around them. As the
particles change speed or direction,a vibrating electric field is created, which in turn produces a
vibrating magnetic field. The vibrating magnetic field creates a vibrating electric field. The
electric and magnetic fields produce each other repeatedly.
True or False: the electric and magnetic fields of an electromagnetic wave vibrate parallel to
each other correct answers False; they vibrate at right angles (perpendicular) to one another
electromagnetic radiation correct answers the energy that electromagnetic waves transfer through
matter or spave
Do electromagnetic waves require a medium? correct answers no, they can travel through a
vacuum, or empty space
Two different models are needed to explain the behavior of electromagnetic waves: correct
answers A wave model best explains many of the behaviors, but a particle model best explains
others.
light is an _______________ wave correct answers electromagnetic; it has many properties of
waves but can also act as though it is a stream of particles
polarized light correct answers the light that passes through a polarizing filter
explain the process of light passing through a polarizing filter correct answers When light passes
through a polarizing filter, it has the properties of a wave. An ordinary beam of light consists of
waves that vibrate in all directions. A polarizing filter acts as though it has tiny slits aligned in
only one direction. The slits can be horizontal or vertical. When light enters a polarizing filter,
only some waves can pass through it. The light that passes through is called polarized light.
Photoelectric effect correct answers Sometimes light behaves like a stream of particles. For
example, when a beam of high frequency light shines on some metals, it causes tiny particles to
, move. These particles are called electrons. Sometimes light can even cause an electron to move
so much that it is knocked out of the metal (this effect can be explained by thinking of light as a
stream of tiny packets, or particles of energy). For the effect to occur, each photon must contain
enough energy to knock an electron free from the metal.
photon correct answers each packet of light energy
All electromagnetic waves travel at the same speed in a vacuum... correct answers ...but they
have different wavelengths and different frequencies.
vacuum correct answers a space that contains no air or othergas
visible light correct answers the only range of wavelengths your eyes can see (electromagnetic
waves that are visible to the human eye)
your radio detects... correct answers ...radio waves, which have much longer wavelength than
visible light
x-rays have much _______ wavelengths than visible light correct answers shorter
For waves in any medium, as the wavelength decreases, the frequency
(INCREASES/DECREASES) correct answers increases; Waves with the longest wavelengths
have the shortest frequencies, and waves with the shortest wavelengths have the highest
frequencies. The higher the frequency of a wave, the higher its energy.
electromagnetic spectrum correct answers the complete range of electromagnetic waves placed
in order of increasing frequency
The electromagnetic spectrum is made up of... correct answers ...radio waves, microwaves,
infrared waves, visible light, visible light, ultraviolet rays, X-rays, and gamma rays
radio waves correct answers electromagnetic waves with the longest wavelengths and the lowest
frequencies- Used in broadcasting to carry signals for radio programs
How can a broadcast station carry signals for radio programs? correct answers They send out
radio waves at certain frequencies. Your radio picks up the radio waves and converts them into
an electric signal. The electric signal is then converted into sound.
Microwaves correct answers Electromagnetic waves that have shorter wavelengths and higher
frequencies than radio waves do.
Radar correct answers stands for RAdio Detection And Ranging; It's a system that uses reflected
microwaves to detect objects and measure their distance and speed. To measure distance, a radar
device sends out microwaves that reflect off an object. The time it takes for the reflected waves
to return is used to calculate the object's distance.
wave correct answers A disturbance that transfers energy from place to place
medium correct answers The material through which a wave travels
vibrate correct answers to move in a repeated back-and-forth or up-and-down motion
electromagnetic wave correct answers a transverse wave that involves the transfer of electric and
magnetic energy
An electromagnetic wave is made up of... correct answers ...vibrating electric and magnetic
fields that move through space or some medium at the speed of light.
How is an electromagnetic wave formed? correct answers An electromagnetic wave can begin
with the movement of charged particles, all of which have electric fields around them. As the
particles change speed or direction,a vibrating electric field is created, which in turn produces a
vibrating magnetic field. The vibrating magnetic field creates a vibrating electric field. The
electric and magnetic fields produce each other repeatedly.
True or False: the electric and magnetic fields of an electromagnetic wave vibrate parallel to
each other correct answers False; they vibrate at right angles (perpendicular) to one another
electromagnetic radiation correct answers the energy that electromagnetic waves transfer through
matter or spave
Do electromagnetic waves require a medium? correct answers no, they can travel through a
vacuum, or empty space
Two different models are needed to explain the behavior of electromagnetic waves: correct
answers A wave model best explains many of the behaviors, but a particle model best explains
others.
light is an _______________ wave correct answers electromagnetic; it has many properties of
waves but can also act as though it is a stream of particles
polarized light correct answers the light that passes through a polarizing filter
explain the process of light passing through a polarizing filter correct answers When light passes
through a polarizing filter, it has the properties of a wave. An ordinary beam of light consists of
waves that vibrate in all directions. A polarizing filter acts as though it has tiny slits aligned in
only one direction. The slits can be horizontal or vertical. When light enters a polarizing filter,
only some waves can pass through it. The light that passes through is called polarized light.
Photoelectric effect correct answers Sometimes light behaves like a stream of particles. For
example, when a beam of high frequency light shines on some metals, it causes tiny particles to
, move. These particles are called electrons. Sometimes light can even cause an electron to move
so much that it is knocked out of the metal (this effect can be explained by thinking of light as a
stream of tiny packets, or particles of energy). For the effect to occur, each photon must contain
enough energy to knock an electron free from the metal.
photon correct answers each packet of light energy
All electromagnetic waves travel at the same speed in a vacuum... correct answers ...but they
have different wavelengths and different frequencies.
vacuum correct answers a space that contains no air or othergas
visible light correct answers the only range of wavelengths your eyes can see (electromagnetic
waves that are visible to the human eye)
your radio detects... correct answers ...radio waves, which have much longer wavelength than
visible light
x-rays have much _______ wavelengths than visible light correct answers shorter
For waves in any medium, as the wavelength decreases, the frequency
(INCREASES/DECREASES) correct answers increases; Waves with the longest wavelengths
have the shortest frequencies, and waves with the shortest wavelengths have the highest
frequencies. The higher the frequency of a wave, the higher its energy.
electromagnetic spectrum correct answers the complete range of electromagnetic waves placed
in order of increasing frequency
The electromagnetic spectrum is made up of... correct answers ...radio waves, microwaves,
infrared waves, visible light, visible light, ultraviolet rays, X-rays, and gamma rays
radio waves correct answers electromagnetic waves with the longest wavelengths and the lowest
frequencies- Used in broadcasting to carry signals for radio programs
How can a broadcast station carry signals for radio programs? correct answers They send out
radio waves at certain frequencies. Your radio picks up the radio waves and converts them into
an electric signal. The electric signal is then converted into sound.
Microwaves correct answers Electromagnetic waves that have shorter wavelengths and higher
frequencies than radio waves do.
Radar correct answers stands for RAdio Detection And Ranging; It's a system that uses reflected
microwaves to detect objects and measure their distance and speed. To measure distance, a radar
device sends out microwaves that reflect off an object. The time it takes for the reflected waves
to return is used to calculate the object's distance.
