For an electromagnetic wave in free space having an $\vec { E }$ field of amplitude E1 and a $\vec { B }$ field of amplitude B1,the ratio of B1 /E1 is equal to

A) c B) c2 C) 1/c D) 1/c2 E) $\sqrt { c}$ A) c B) c2 C) 1/c D) 1/c2 E) $\sqrt { c}$

The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of 0.601 W/m2.What is the maximum value of the $\vec { B }$ field in the wave? (c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T ∙ m/A,ε0 = 8.85 × 10-12 C2/N ∙ m2)

A) 7.09 × 10-8 T B) 5.02 × 10-8 T C) 3.55 × 10-8 T D) 9.81 × 10-8 T E) 1.42 × 10-7 T A) 7.09 × 10-8 T B) 5.02 × 10-8 T C) 3.55 × 10-8 T D) 9.81 × 10-8 T E) 1.42 × 10-7 T

How long does it take light to travel 1.0 m? (c = 3.0 × 108 m/s)

A) 3.3 ns B) 3.3 μs C) 3.3 ms D) 3.3 s A) 3.3 ns B) 3.3 μs C) 3.3 ms D) 3.3 s

The maximum magnetic energy density of a sinusoidal electromagnetic wave is 8.95 × 10-5 J/m3.What is the amplitude of the $\vec { B }$ field component of this wave? (c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T ∙ m/A,ε0 = 8.85 × 10-12 C2/N ∙ m2)

A) 12.0 μT B) 13.0 μT C) 14.0 μT D) 15.0 μT E) 16.0 μT A) 12.0 μT B) 13.0 μT C) 14.0 μT D) 15.0 μT E) 16.0 μT

About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun,which is 1.5 × 1011 m away.Use this information to estimate the average power output of the sun.

A) 1 × 1026 W B) 2 × 1026 W C) 3 × 1026 W D) 4 × 1026 W A) 1 × 1026 W B) 2 × 1026 W C) 3 × 1026 W D) 4 × 1026 W

Exam 25: Electromagnetic Waves

Unpolarized light passes through a combination of two ideal polarizers.The transmission axes of the first polarizer and the second polarizer are at 30.0° to each other.What percentage of the original light gets through the combination?

(Multiple Choice)

4.8/5

(81)

Question 41

Light passes through three ideal polarizing sheets.Unpolarized light enters the first sheet and the resultant vertically polarized beam continues through the second sheet and third sheet.The second sheet has its transmission axis at 50° with respect to the first sheet,and the third sheet is at 70° with respect to the first sheet. (a)What percent of the original intensity emerges from filter #1? (b)What percent of the original intensity emerges from filter #2? (c)What percent of the original intensity emerges from filter #3?

(Short Answer)

4.9/5

(79)

Question 42

The following items are positioned in sequence: A source of a beam of natural light of intensity I₀,three ideal polarizers A,B,and C; and an observer.Polarizer axis angles are measured clockwise from the vertical,as viewed by the observer.The axis angle of polarizer A is set at 0° (vertical),and the axis angle of polarizer C is set at 50°.The axis angle of polarizer B is set at 120°.What is ratio of the intensity of the beam at the observer to the intensity I₀ of the source?

(Multiple Choice)

4.9/5

(79)

Question 43

Which of the following statements about electromagnetic waves in a vacuum are true? (There could be more than one correct choice.)

(Multiple Choice)

4.8/5

(81)

Question 44

Three ideal polarizers are oriented as follows: The axis of the second polarizer is at an angle of 59.0° relative to the first one.The axis of the third polarizer is at an angle of 31.0° relative to the second one,so the axis of the axis of the third polarizer is perpendicular to the axis of the first one.Unpolarized light of intensity $18.6 \mathrm {~W} / \mathrm { m } ^ { 2 }$ is incident on the first polarizer. (a)What is the intensity of the light after it passes through all three polarizers? (b)What is the intensity of the transmitted light if the second polarizer is removed?

(Short Answer)

4.8/5

(84)

Question 45

An electromagnetic wave is propagating towards the west in a vacuum.At a certain moment the direction of the $\vec { B }$ field vector associated with this wave points vertically upward.What is the direction of the $\vec { E }$ field vector?

(Multiple Choice)

4.9/5

(83)

Question 46

For an electromagnetic wave in free space having an $\vec { E }$ field of amplitude E₁ and a $\vec { B }$ field of amplitude B₁,the ratio of B₁/E₁ is equal to

(Multiple Choice)

4.9/5

(74)

Question 47

Which one of the following is not an electromagnetic wave?

(Multiple Choice)

4.9/5

(91)

Question 48

An 8.00-mW laser beam emits a cylindrical beam of single-wavelength sinusoidal light 0.600 mm in diameter.What is the maximum value of the $\vec { B }$ field in the laser beam? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²,μ₀ = 4π × 10^-7 T ∙ m/A,c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.8/5

(87)

Question 49

The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of 0.601 W/m².What is the maximum value of the $\vec { B }$ field in the wave? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

(Multiple Choice)

4.8/5

(78)

Question 50

The distance between two asteroids is 1600 km.How much time does it take for a light signal to go from one asteroid to the other? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.9/5

(74)

Question 51

A radio station broadcasts at 80 MHz.How long does it take for this radio signal to travel a distance of $2.0 \times 10 ^ { 7 } \mathrm {~m}$ through space? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.8/5

(90)

Question 52

How long does it take light to travel 1.0 m? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.8/5

(70)

Question 53

A 4.4 × $10^{14}$ Hz laser emits a 2.1 μs pulse that is 5.0 mm in diameter.The energy density in the beam is $0.24 \mathrm {~J} / \mathrm { m } ^ { 3 }$ How many wavelengths are there in the length of the beam? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

(Multiple Choice)

4.9/5

(77)

Question 54

A certain electromagnetic field traveling in vacuum has a maximum electric field of 1200 V/m.What is the maximum $\vec { B }$ field of this wave? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.9/5

(81)

Question 55

The maximum magnetic energy density of a sinusoidal electromagnetic wave is 8.95 × 10^-5 J/m³.What is the amplitude of the $\vec { B }$ field component of this wave? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

(Multiple Choice)

4.9/5

(76)

Question 56

A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm.What is the lowest frequency associated with this portion of the spectrum? (c = 3.00 × 10⁸ m/s)

(Multiple Choice)

4.7/5

(92)

Question 57

An FM radio station broadcasts at 96.7 MHz.What is the wavelength of the radio wave used for this broadcast? (c = 3.0 × 10⁸ m/s)

(Short Answer)

4.8/5

(93)

Question 58

About 1350 W/m² of electromagnetic energy reaches the upper atmosphere of the earth from the sun,which is 1.5 × 10¹¹ m away.Use this information to estimate the average power output of the sun.

(Multiple Choice)

4.9/5

(86)

Question 59

When light in air strikes the flat surface of a certain glass at 31.2° with the normal,the reflected ray is 100 percent polarized.What is the critical angle for the air-glass interface of this glass?

(Multiple Choice)

4.9/5

(76)

Question 60

Showing 41 - 60 of 79

Exam 25: Electromagnetic Waves

Unpolarized light passes through a combination of two ideal polarizers.The transmission axes of the first polarizer and the second polarizer are at 30.0° to each other.What percentage of the original light gets through the combination?

Which of the following statements about electromagnetic waves in a vacuum are true? (There could be more than one correct choice.)

An electromagnetic wave is propagating towards the west in a vacuum.At a certain moment the direction of the B⃗\vec { B }B field vector associated with this wave points vertically upward.What is the direction of the E⃗\vec { E }E field vector?

For an electromagnetic wave in free space having an E⃗\vec { E }E field of amplitude E1 and a B⃗\vec { B }B field of amplitude B1,the ratio of B1 /E1 is equal to

Which one of the following is not an electromagnetic wave?

An 8.00-mW laser beam emits a cylindrical beam of single-wavelength sinusoidal light 0.600 mm in diameter.What is the maximum value of the B⃗\vec { B }B field in the laser beam? (ε0 = 8.85 × 10-12 C2/N ∙ m2,μ0 = 4π × 10-7 T ∙ m/A,c = 3.0 × 108 m/s)

The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of 0.601 W/m2.What is the maximum value of the B⃗\vec { B }B field in the wave? (c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T ∙ m/A,ε0 = 8.85 × 10-12 C2/N ∙ m2)

The distance between two asteroids is 1600 km.How much time does it take for a light signal to go from one asteroid to the other? (c = 3.0 × 108 m/s)

A radio station broadcasts at 80 MHz.How long does it take for this radio signal to travel a distance of 2.0×107 m2.0 \times 10 ^ { 7 } \mathrm {~m}2.0×107 m through space? (c = 3.0 × 108 m/s)

How long does it take light to travel 1.0 m? (c = 3.0 × 108 m/s)

A certain electromagnetic field traveling in vacuum has a maximum electric field of 1200 V/m.What is the maximum B⃗\vec { B }B field of this wave? (c = 3.0 × 108 m/s)

The maximum magnetic energy density of a sinusoidal electromagnetic wave is 8.95 × 10-5 J/m3.What is the amplitude of the B⃗\vec { B }B field component of this wave? (c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T ∙ m/A,ε0 = 8.85 × 10-12 C2/N ∙ m2)

A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm.What is the lowest frequency associated with this portion of the spectrum? (c = 3.00 × 108 m/s)

An FM radio station broadcasts at 96.7 MHz.What is the wavelength of the radio wave used for this broadcast? (c = 3.0 × 108 m/s)

About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun,which is 1.5 × 1011 m away.Use this information to estimate the average power output of the sun.

When light in air strikes the flat surface of a certain glass at 31.2° with the normal,the reflected ray is 100 percent polarized.What is the critical angle for the air-glass interface of this glass?

Introduction

Kinematics: Motion in One Dimension

Newtonian Mechanics

Applying Newtons Laws

Circular Motion

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Gases

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

The Electric Field

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Special Relativity

Quantum Optics

Atomic Physics

Nuclear Physics

Particle Physics

Filters

An electromagnetic wave is propagating towards the west in a vacuum.At a certain moment the direction of the $\vec { B }$ field vector associated with this wave points vertically upward.What is the direction of the $\vec { E }$ field vector?

For an electromagnetic wave in free space having an $\vec { E }$ field of amplitude E₁ and a $\vec { B }$ field of amplitude B₁,the ratio of B₁/E₁ is equal to

An 8.00-mW laser beam emits a cylindrical beam of single-wavelength sinusoidal light 0.600 mm in diameter.What is the maximum value of the $\vec { B }$ field in the laser beam? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²,μ₀ = 4π × 10^-7 T ∙ m/A,c = 3.0 × 10⁸ m/s)

The rate of energy flow per unit area of a sinusoidal electromagnetic wave has an average value of 0.601 W/m².What is the maximum value of the $\vec { B }$ field in the wave? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

The distance between two asteroids is 1600 km.How much time does it take for a light signal to go from one asteroid to the other? (c = 3.0 × 10⁸ m/s)

A radio station broadcasts at 80 MHz.How long does it take for this radio signal to travel a distance of $2.0 \times 10 ^ { 7 } \mathrm {~m}$ through space? (c = 3.0 × 10⁸ m/s)

How long does it take light to travel 1.0 m? (c = 3.0 × 10⁸ m/s)

A certain electromagnetic field traveling in vacuum has a maximum electric field of 1200 V/m.What is the maximum $\vec { B }$ field of this wave? (c = 3.0 × 10⁸ m/s)

The maximum magnetic energy density of a sinusoidal electromagnetic wave is 8.95 × 10^-5 J/m³.What is the amplitude of the $\vec { B }$ field component of this wave? (c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T ∙ m/A,ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm.What is the lowest frequency associated with this portion of the spectrum? (c = 3.00 × 10⁸ m/s)

An FM radio station broadcasts at 96.7 MHz.What is the wavelength of the radio wave used for this broadcast? (c = 3.0 × 10⁸ m/s)

About 1350 W/m² of electromagnetic energy reaches the upper atmosphere of the earth from the sun,which is 1.5 × 10¹¹ m away.Use this information to estimate the average power output of the sun.