Question 1

The ratio of the electric field to the magnetic field in the electromagnetic wave is the speed of the light.

Accepted Answer

A) True 
 B)False

Question 2

The direction of propagation of electromagnetic waves is given by the

Accepted Answer

A)  right hand rule. 
B)  left hand rule. 
C)  right and left hand rules. 
D)  None of the other answers given is correct. 
A)  right hand rule. 
B)  left hand rule. 
C)  right and left hand rules. 
D)  None of the other answers given is correct.

Question 3

The transmitted intensity of an unpolarized beam of light passing through a polarizer is one half of the value of the original intensity.

Accepted Answer

A) True 
 B)False

Question 4

Accelerated charges radiate electromagnetic waves.

Accepted Answer

A) True 
 B)False

Question 5

A 60.0 W light bulb radiates light uniformly in all different directions. What is the average intensity of the light bulb at a distance of 0.400 m from the bulb?

Accepted Answer

A)  14.9 W/m2 
B)  37.2 W/m2 
C)  27.4 W/m2 
D)  11.9 W/m2 
E)  29.8 W/m2 
A)  14.9 W/m2 
B)  37.2 W/m2 
C)  27.4 W/m2 
D)  11.9 W/m2 
E)  29.8 W/m2

Question 6

The right hand rule for the direction of propagation of the electromagnetic waves is to

Accepted Answer

A)  point the forefinger of your right hand toward E vector, middle finger toward the B vector, and the thumb will represent the propagation. 
B)  point the middle finger toward the E vector, the forefinger toward the B vector, and the thumb will represent the direction of propagation. 
C)  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. 
D)  point the fingers of your left hand toward the E vector, curl your fingers towards the B vector, and the thumb will point the direction of propagation. 
E)  None of the other answers is correct. 
A)  point the forefinger of your right hand toward E vector, middle finger toward the B vector, and the thumb will represent the propagation. 
B)  point the middle finger toward the E vector, the forefinger toward the B vector, and the thumb will represent the direction of propagation. 
C)  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. 
D)  point the fingers of your left hand toward the E vector, curl your fingers towards the B vector, and the thumb will point the direction of propagation. 
E)  None of the other answers is correct.

Question 7

Electromagnetic waves transmit electromagnetic energy.

Accepted Answer

A) True 
 B)False

Question 8

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°.

Accepted Answer

A) True 
 B)False

Question 9

If the radiation from the Sun reaching above atmosphere of Earth is at the rate of 1350 W/m2, what is the maximum value of the electric field associated with this wave?

Accepted Answer

A)  675.0 V/m 
B)  1604 V/m 
C)  1400 V/m 
D)  1350 V/m 
E)  1010 V/m 
A)  675.0 V/m 
B)  1604 V/m 
C)  1400 V/m 
D)  1350 V/m 
E)  1010 V/m

Question 10

Electromagnetic waves are longitudinal.

Accepted Answer

A) True 
 B)False

Exam 25: Electromagnetic Waves

The ratio of the electric field to the magnetic field in the electromagnetic wave is the speed of the light.

The direction of propagation of electromagnetic waves is given by the

The transmitted intensity of an unpolarized beam of light passing through a polarizer is one half of the value of the original intensity.

Accelerated charges radiate electromagnetic waves.

A 60.0 W light bulb radiates light uniformly in all different directions. What is the average intensity of the light bulb at a distance of 0.400 m from the bulb?

The right hand rule for the direction of propagation of the electromagnetic waves is to

Electromagnetic waves transmit electromagnetic energy.

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°.

If the radiation from the Sun reaching above atmosphere of Earth is at the rate of 1350 W/m2, what is the maximum value of the electric field associated with this wave?

Electromagnetic waves are longitudinal.

Introduction to Physics

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If the radiation from the Sun reaching above atmosphere of Earth is at the rate of 1350 W/m², what is the maximum value of the electric field associated with this wave?