PHYS 202 Final Exam Questions and Answers Latest Update 2025
An electromagnetic wave is a result of electric and magnetic fields acting together. - Answers True
The speed of electromagnetic waves through a vacuum is ten times the speed of sound in air. - Answers
False
Electromagnetic waves in a vacuum travel with the speed of light. - Answers True
Electromagnetic waves do not require a medium to be transmitted. - Answers True
Electromagnetic waves are a result of a stationary electric field and a changing magnetic field. - Answers
False
Electromagnetic waves are transverse in nature. - Answers True
Accelerated charges radiate electromagnetic waves. - Answers True
The Doppler effect applies to sound waves but not to electromagnetic waves. - Answers False
The Doppler effect is observed when the source and the observer are at rest with respect to each other.
- Answers False
The ratio of the electric field to the magnetic field in the electromagnetic wave is the speed of the light. -
Answers True
Electromagnetic waves transmit electromagnetic energy - Answers True
The electric energy density in an electromagnetic wave is higher than its magnetic energy density. -
Answers False
The intensity of the radiation field of an antenna is inversely proportional to the distance from the
antenna - Answers False
The magnitude of the electric field in the radiation field from an antenna is inversely proportional to the
distance from the antenna. - Answers True
The transmitted intensity of an unpolarized beam of light passing through a polarizer is one half of the
value of the original intensity. - Answers True
According to the law of Malus, the transmitted intensity of a polarized beam of light passing through a
polarizer is unchanged for an angle of 90°. - Answers False
The physicist responsible for explaining the wave nature of light was - Answers James Clerk Maxwell.
In an electromagnetic wave the and fields are oriented such that - Answers they are perpendicular to
one another and perpendicular to the direction of wave propagation.
, An electromagnetic wave is propagating towards the west. At a certain moment the direction of the
magnetic field vector associated with this wave points vertically up. What is the direction of the electric
field vector? - Answers Horizontal and pointing south
Electromagnetic waves can be produced by - Answers electric charges in accelerated motion
The direction of propagation of electromagnetic waves is given by the - Answers right hand rule.
The right hand rule for the direction of propagation of the electromagnetic waves is to: - Answers point
the fingers of your right hand toward the E vector, curl your fingers towards the B vector, and the thumb
will point the direction of propagation.
The first scientific attempt to measure the speed of light was made by - Answers Galileo.
In 1676 Romer announced what value for the speed of light? - Answers 2.25 × 108 m/s
Which of the following expressions is the correct representation for the speed of light? - Answers
1/sqrt(E0U0)
) Which one of the following is the correct representation of the relationship between the speed of a
wave (v), frequency of the wave (f), and its wavelength (λ)? - Answers v = fλ
Which one of the following is not an electromagnetic wave?
A) UV
B) infrared
C) radio waves
D) sound waves
E) gamma rays - Answers Sound waves
Which one of the following is the correct order of the electromagnetic spectrum from low to high
frequencies? - Answers radio waves, microwaves, infrared, visible, UV, X-rays, gamma rays
Which one of the following is the correct representation of the electromagnetic waves from longer
wavelength to shorter wavelength? - Answers radio waves, microwaves, infrared, visible, UV, X-rays,
gamma rays
A particle of interplanetary dust is close to the Sun and interacts with the Sun's gravitational field as well
as with the light emitted by the Sun. If it only interacts appreciably with the Sun, can it be pushed away
from the Sun instead of being pulled towards it? - Answers Yes, if the object is small enough, radiation
pressure will win over.
Two objects are in all respects identical except for the fact that one was coated with a substance that is
an excellent reflector of light while the other was coated with a substance that is a perfect absorber of
An electromagnetic wave is a result of electric and magnetic fields acting together. - Answers True
The speed of electromagnetic waves through a vacuum is ten times the speed of sound in air. - Answers
False
Electromagnetic waves in a vacuum travel with the speed of light. - Answers True
Electromagnetic waves do not require a medium to be transmitted. - Answers True
Electromagnetic waves are a result of a stationary electric field and a changing magnetic field. - Answers
False
Electromagnetic waves are transverse in nature. - Answers True
Accelerated charges radiate electromagnetic waves. - Answers True
The Doppler effect applies to sound waves but not to electromagnetic waves. - Answers False
The Doppler effect is observed when the source and the observer are at rest with respect to each other.
- Answers False
The ratio of the electric field to the magnetic field in the electromagnetic wave is the speed of the light. -
Answers True
Electromagnetic waves transmit electromagnetic energy - Answers True
The electric energy density in an electromagnetic wave is higher than its magnetic energy density. -
Answers False
The intensity of the radiation field of an antenna is inversely proportional to the distance from the
antenna - Answers False
The magnitude of the electric field in the radiation field from an antenna is inversely proportional to the
distance from the antenna. - Answers True
The transmitted intensity of an unpolarized beam of light passing through a polarizer is one half of the
value of the original intensity. - Answers True
According to the law of Malus, the transmitted intensity of a polarized beam of light passing through a
polarizer is unchanged for an angle of 90°. - Answers False
The physicist responsible for explaining the wave nature of light was - Answers James Clerk Maxwell.
In an electromagnetic wave the and fields are oriented such that - Answers they are perpendicular to
one another and perpendicular to the direction of wave propagation.
, An electromagnetic wave is propagating towards the west. At a certain moment the direction of the
magnetic field vector associated with this wave points vertically up. What is the direction of the electric
field vector? - Answers Horizontal and pointing south
Electromagnetic waves can be produced by - Answers electric charges in accelerated motion
The direction of propagation of electromagnetic waves is given by the - Answers right hand rule.
The right hand rule for the direction of propagation of the electromagnetic waves is to: - Answers point
the fingers of your right hand toward the E vector, curl your fingers towards the B vector, and the thumb
will point the direction of propagation.
The first scientific attempt to measure the speed of light was made by - Answers Galileo.
In 1676 Romer announced what value for the speed of light? - Answers 2.25 × 108 m/s
Which of the following expressions is the correct representation for the speed of light? - Answers
1/sqrt(E0U0)
) Which one of the following is the correct representation of the relationship between the speed of a
wave (v), frequency of the wave (f), and its wavelength (λ)? - Answers v = fλ
Which one of the following is not an electromagnetic wave?
A) UV
B) infrared
C) radio waves
D) sound waves
E) gamma rays - Answers Sound waves
Which one of the following is the correct order of the electromagnetic spectrum from low to high
frequencies? - Answers radio waves, microwaves, infrared, visible, UV, X-rays, gamma rays
Which one of the following is the correct representation of the electromagnetic waves from longer
wavelength to shorter wavelength? - Answers radio waves, microwaves, infrared, visible, UV, X-rays,
gamma rays
A particle of interplanetary dust is close to the Sun and interacts with the Sun's gravitational field as well
as with the light emitted by the Sun. If it only interacts appreciably with the Sun, can it be pushed away
from the Sun instead of being pulled towards it? - Answers Yes, if the object is small enough, radiation
pressure will win over.
Two objects are in all respects identical except for the fact that one was coated with a substance that is
an excellent reflector of light while the other was coated with a substance that is a perfect absorber of
