Question 1

What is a light-year in SI units?

Accepted Answer

A)    3.0×1015 m3.0 	imes 1015 \mathrm{~m}3.0×1015 m 
B)    3.0×1011 m3.0 	imes 1011 \mathrm{~m}3.0×1011 m 
C)    1.1×1011 m1.1 	imes 10^{11} \mathrm{~m}1.1×1011 m 
D)    4.5×1037 m4.5 	imes 1037 \mathrm{~m}4.5×1037 m 
E)    9.5×1015 m9.5 	imes 1015 \mathrm{~m}9.5×1015 mF) B) and C)
G) A) and E) E

Question 2

If a  20 W20 \mathrm{~W}20 W  laser beam, which has an initial diameter of  2.0 mm2.0 \mathrm{~mm}2.0 mm , spreads out to a diameter of  2.0 m2.0 \mathrm{~m}2.0 m  after traveling  10,000 m10,000 \mathrm{~m}10,000 m , what is the final intensity of the beam?

Accepted Answer

A)    20×10−6 W/m220 	imes 10^{-6} \mathrm{~W} / \mathrm{m}^{2}20×10−6 W/m2 
B)    6.4×10−6 W/m26.4 	imes 10^{-6} \mathrm{~W} / \mathrm{m}^{2}6.4×10−6 W/m2 
C)    20×10−4 W/m220 	imes 10^{-4} \mathrm{~W} / \mathrm{m}^{2}20×10−4 W/m2 
D)    20×10−8 W/m220 	imes 10^{-8} \mathrm{~W} / \mathrm{m}^{2}20×10−8 W/m2 
E)    6.4 W/m26.4 \mathrm{~W} / \mathrm{m}^{2}6.4 W/m2F) A) and B)
G) A) and C)

Question 3

ε0μ0=\varepsilon_{0} \mu_{0}=ε0​μ0​=  ?

Accepted Answer

A)    C−2\mathrm{C}^{-2}C−2 
B)    C\mathrm{C}C 
C)    c2\mathrm{c}^{2}c2 
D)    C−1\mathrm{C}^{-1}C−1 
E)    C1/2\mathrm{C}^{1 / 2}C1/2F) B) and D)
G) B) and C)

Question 4

Which of the following is the direction of an electromagnetic wave having electric and magnetic field vectors  E\mathbf{E}E  and  B\mathbf{B}B  ?

Accepted Answer

A)    B×E\mathbf{B} 	imes \mathbf{E}B×E 
B)    E×B\mathbf{E} 	imes \mathbf{B}E×B 
C)    B\mathbf{B}B 
D)    E\mathbf{E}E 
E)    E+B\mathbf{E}+\mathbf{B}E+BF) C) and E)
G) D) and E)

Question 5

How fast would you have to drive in order to see a red light as green? Assume  λ=630 nm\lambda=630 \mathrm{~nm}λ=630 nm  for red and  λ=\lambda=λ=   530 nm530 \mathrm{~nm}530 nm  for green.

Accepted Answer

A)    5×107 m/s5 	imes 10^{7} \mathrm{~m} / \mathrm{s}5×107 m/s 
B)    5×105 m/s5 	imes 105 \mathrm{~m} / \mathrm{s}5×105 m/s 
C)    5×106 m/s5 	imes 106 \mathrm{~m} / \mathrm{s}5×106 m/s 
D)    5×104 m/s5 	imes 104 \mathrm{~m} / \mathrm{s}5×104 m/sE) A) and D)
F) A) and C)

Question 6

A  20 W20 \mathrm{~W}20 W  laser beam, with an initial diameter of  2.0 mm2.0 \mathrm{~mm}2.0 mm , spreads out to a diameter of  2.0 m2.0 \mathrm{~m}2.0 m  after traveling  10,000 m10,000 \mathrm{~m}10,000 m . What is the initial intensity of the beam?

Accepted Answer

A)    6.4×106 W/m26.4 	imes 10^{6} \mathrm{~W} / \mathrm{m}^{2}6.4×106 W/m2 
B)    1.0×105 W/m21.0 	imes 105 \mathrm{~W} / \mathrm{m}^{2}1.0×105 W/m2 
C)    2.0×105 W/m22.0 	imes 10^{5} \mathrm{~W} / \mathrm{m}^{2}2.0×105 W/m2 
D)    3.2×106 W/m23.2 	imes 10^{6} \mathrm{~W} / \mathrm{m}^{2}3.2×106 W/m2 
E)    20×106 W/m220 	imes 106 \mathrm{~W} / \mathrm{m}^{2}20×106 W/m2F) D) and E)
G) B) and D)

Question 7

In vacuum, the components of an  EM2\mathrm{EM}^{2}EM2  wave are  Ey=(50 V/m) cos⁡[(5.00 m−1) x+ωt],Ex=0\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m})  \cos \left[\left(5.00 \mathrm{~m}^{-1}\right)  \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0Ey​=(50 V/m) cos[(5.00 m−1) x+ωt],Ex​=0 , and  Ez=0\mathrm{E}_{\mathrm{z}}=0Ez​=0 . In what direction is this wave moving?

Accepted Answer

A)   positive  yyy -direction
B)   negative  xxx -direction
C)   positive  xxx -direction
D)   positive or negative z-direction
E)   negative y-direction F) B) and D)
G) B) and C)

Question 8

Household wiring can emit electromagnetic waves of frequency  60 Hz60 \mathrm{~Hz}60 Hz . What is the wavelength of these waves?

Accepted Answer

A)    5.0×106 m5.0 	imes 10^{6} \mathrm{~m}5.0×106 m 
B)    5.0×104 m5.0 	imes 10^{4} \mathrm{~m}5.0×104 m 
C)    5.0×103 m5.0 	imes 10^{3} \mathrm{~m}5.0×103 m 
D)    5.0×102 m5.0 	imes 10^{2} \mathrm{~m}5.0×102 m 
E)    5.0×105 m5.0 	imes 10^{5} \mathrm{~m}5.0×105 mF) D) and E)
G) A) and B)

Question 9

Using the approximate formula for the Doppler shift,  fo≈fS(1+vrel/c) \mathrm{f}_{\mathrm{o}} \approx \mathrm{f}_{\mathrm{S}}\left(1+\mathrm{v}_{\mathrm{rel}} / \mathrm{c}\right) fo​≈fS​(1+vrel​/c)   one finds that a source is moving away at  0.60c0.60 \mathrm{c}0.60c . What result would the exact formula yield for the recession speed?

Accepted Answer

A)    0.40c0.40 \mathrm{c}0.40c 
B)    0.84c0.84 \mathrm{c}0.84c 
C)    0.54c0.54 \mathrm{c}0.54c 
D)    0.72c0.72 \mathrm{c}0.72c 
E)    0.60c0.60 \mathrm{c}0.60cF) A) and C)
G) C) and D)

Question 10

Nexrad radar uses electromagnetic radiation of frequency of  2.7GHz2.7 \mathrm{GHz}2.7GHz  to measure the speed of cloud systems. Radio waves from a transmitter are sent outward toward a cloud system, and the waves are reflected back toward the source. If the cloud system is moving, the reflected waves will be Doppler shifted. Suppose a Nexrad system observes clouds moving toward the transmitter at  21 m/s21 \mathrm{~m} / \mathrm{s}21 m/s . What is the difference between the transmitted and received frequencies of the radar in this case?

Accepted Answer

A)    570 Hz570 \mathrm{~Hz}570 Hz 
B)    190 Hz190 \mathrm{~Hz}190 Hz 
C)    380 Hz380 \mathrm{~Hz}380 Hz 
D)    760 Hz760 \mathrm{~Hz}760 HzE) A) and B)
F) A) and C)

Question 11

What is the wave number for a wavelength of  600 nm600 \mathrm{~nm}600 nm  ?

Accepted Answer

A)    9.55×10−8 m9.55 	imes 10^{-8} \mathrm{~m}9.55×10−8 m 
B)    600 nm600 \mathrm{~nm}600 nm 
C)    9.55×10−8 m−19.55 	imes 10^{-8} \mathrm{~m}^{-1}9.55×10−8 m−1 
D)    1.05×107 m−11.05 	imes 10^{7} \mathrm{~m}^{-1}1.05×107 m−1 
E)    1.67×106 m−11.67 	imes 10^{6} \mathrm{~m}^{-1}1.67×106 m−1F) A) and B)
G) A) and C) D

Question 12

What is the speed of light in a material that has an index of refraction of 2.0?

Accepted Answer

A)    1.5×108 m/s1.5 	imes 10^{8} \mathrm{~m} / \mathrm{s}1.5×108 m/s 
B)    2.0×108 m/s2.0 	imes 10^{8}\mathrm{~m} / \mathrm{s}2.0×108 m/s 
C)    5.0×108 m/s5.0 	imes 10^{8} \mathrm{~m} / \mathrm{s}5.0×108 m/s 
D)    6.0×108 m/s6.0 	imes 10^{8} \mathrm{~m} / \mathrm{s}6.0×108 m/s 
E)   No such index can exist. F) None of the above
G) C) and D)

Question 13

The Sun is  1.50×108 km1.50 	imes 10^{8} \mathrm{~km}1.50×108 km  from the Earth. How long does it take for light to reach us from the Sun?

Accepted Answer

A)    8.33 min8.33 \mathrm{~min}8.33 min 
B)    2.00 s2.00 \mathrm{~s}2.00 s 
C)    0.50 s0.50 \mathrm{~s}0.50 s 
D)    2.00 ms2.00 \mathrm{~ms}2.00 ms 
E)   almost instantaneous F) None of the above
G) A) and E) A

Question 14

If the intensity of radiation from the Sun is  1.4 kW/m21.4 \mathrm{~kW} / \mathrm{m}^{2}1.4 kW/m2  at a distance of  150×106 km150 	imes 10^{6} \mathrm{~km}150×106 km , at what distance is the intensity  5.6 kW/m25.6 \mathrm{~kW} / \mathrm{m}^{2}5.6 kW/m2  ?

Accepted Answer

A)    75×106 km75 	imes 10^{6} \mathrm{~km}75×106 km 
B)    38×106 km38 	imes 106 \mathrm{~km}38×106 km 
C)    100×106 km100 	imes 10^{6} \mathrm{~km}100×106 km 
D)    300×106 km300 	imes 10^{6} \mathrm{~km}300×106 km 
E)   less than  30×106 km30 	imes 10^{6} \mathrm{~km}30×106 kmF) C) and D)
G) D) and E)

Question 15

At the summer solstice in June, at what latitude is the Sun directly overhead at solar noon?

Accepted Answer

A)    23.5∘S23.5^{\circ} \mathrm{S}23.5∘S 
B)    23.5∘N23.5^{\circ} \mathrm{N}23.5∘N 
C)    40.0∘N40.0^{\circ} \mathrm{N}40.0∘N 
D)    66.5∘N66.5^{\circ} \mathrm{N}66.5∘N 
E)    0.0∘0.0^{\circ}0.0∘  (the equator)  F) C) and D)
G) C) and E)

Question 16

In vacuum, the components of an  EM\mathrm{EM}EM  wave are  Ey=(50 V/m) cos⁡[(5.00 m−1) x+ωt],Ex=0\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m})  \cos \left[\left(5.00 \mathrm{~m}^{-1}\right)  \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0Ey​=(50 V/m) cos[(5.00 m−1) x+ωt],Ex​=0 , and  EZ=0\mathrm{E}_{\mathrm{Z}}=0EZ​=0 . What is the wavelength of the wave?

Accepted Answer

A)    1.26 m1.26 \mathrm{~m}1.26 m 
B)    2.52 m2.52 \mathrm{~m}2.52 m 
C)    5.00 m5.00 \mathrm{~m}5.00 m 
D)    0.200 m0.200 \mathrm{~m}0.200 m 
E)    0.796 m0.796 \mathrm{~m}0.796 mF) D) and E)
G) A) and C)

Question 17

If unpolarized light with  Erms=20 V/m\mathrm{E}_{\mathrm{rms}}=20 \mathrm{~V} / \mathrm{m}Erms​=20 V/m  is passed through a polarizer, what is the transmitted  Erms\mathrm{E}_{\mathrm{rms}}Erms​  ?

Accepted Answer

A)    20 V/m20 \mathrm{~V} / \mathrm{m}20 V/m 
B)    5.0 V/m5.0 \mathrm{~V} / \mathrm{m}5.0 V/m 
C)    10 V/m10 \mathrm{~V} / \mathrm{m}10 V/m 
D)    7.1 V/m7.1 \mathrm{~V} / \mathrm{m}7.1 V/m 
E)    14 V/m14 \mathrm{~V} / \mathrm{m}14 V/mF) A) and B)
G) A) and E)

Question 18

What iindex of refraction halves the wavelength that light has in a vacuum?

Accepted Answer

A)   2.00
B)   1.33
C)   5.00
D)   1.41
E)   1.50F) A) and B)
G) B) and E)

Question 19

In vacuum, the components of an  EM\mathrm{EM}EM  wave are  Ey=(50 V/m) cos⁡[(5.00 m−1) x+ωt],Ex=0\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m})  \cos \left[\left(5.00 \mathrm{~m}^{-1}\right)  \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0Ey​=(50 V/m) cos[(5.00 m−1) x+ωt],Ex​=0 , and  Ez=0\mathrm{E}_{\mathrm{z}}=0Ez​=0 . What is  ω\omegaω  ?

Accepted Answer

A)    1.00×109rad/s1.00 	imes 10^{9} \mathrm{rad} / \mathrm{s}1.00×109rad/s 
B)    1.50×109rad/s1.50 	imes 10^{9} \mathrm{rad} / \mathrm{s}1.50×109rad/s 
C)    8.00×108rad/s8.00 	imes 10^{8} \mathrm{rad} / \mathrm{s}8.00×108rad/s 
D)    1.20×109rad/s1.20 	imes 10^{9} \mathrm{rad} / \mathrm{s}1.20×109rad/s 
E)   More information is needed. F) B) and E)
G) C) and E)

Question 20

In vacuum, the components of an  EM\mathrm{EM}EM  wave are  Ey=(50 V/m) cos⁡[(5.0 m−1) x+ωt],Ex=0\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m})  \cos \left[\left(5.0 \mathrm{~m}^{-1}\right)  \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0Ey​=(50 V/m) cos[(5.0 m−1) x+ωt],Ex​=0 , and  EZ=0\mathrm{E}_{\mathrm{Z}}=0EZ​=0 . What is the amplitude of the magnetic field for this wave?

Accepted Answer

A)    1.50×10−6 T1.50 	imes 10^{-6} \mathrm{~T}1.50×10−6 T 
B)    1.67×10−7 T1.67 	imes 10^{-7} \mathrm{~T}1.67×10−7 T 
C)    2.00×10−7 T2.00 	imes 10^{-7} \mathrm{~T}2.00×10−7 T 
D)    5.00×10−7 T5.00 	imes 10^{-7} \mathrm{~T}5.00×10−7 T 
E)    1.33×10−6 T1.33 	imes 10^{-6} \mathrm{~T}1.33×10−6 TF) A) and D)
G) B) and D)

Exam 22: Electromagnetic Waves

What is a light-year in SI units?

Correct Answer
verified
E

If a $20 \mathrm{~W}$ laser beam, which has an initial diameter of $2.0 \mathrm{~mm}$ , spreads out to a diameter of $2.0 \mathrm{~m}$ after traveling $10,000 \mathrm{~m}$ , what is the final intensity of the beam?

Correct Answer
verified

$\varepsilon_{0} \mu_{0}=$ ?

Correct Answer
verified

Which of the following is the direction of an electromagnetic wave having electric and magnetic field vectors $\mathbf{E}$ and $\mathbf{B}$ ?

Correct Answer
verified

How fast would you have to drive in order to see a red light as green? Assume $\lambda=630 \mathrm{~nm}$ for red and $\lambda=$ $530 \mathrm{~nm}$ for green.

Correct Answer
verified

A $20 \mathrm{~W}$ laser beam, with an initial diameter of $2.0 \mathrm{~mm}$ , spreads out to a diameter of $2.0 \mathrm{~m}$ after traveling $10,000 \mathrm{~m}$ . What is the initial intensity of the beam?

Correct Answer
verified

In vacuum, the components of an $\mathrm{EM}^{2}$ wave are $\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m}) \cos \left[\left(5.00 \mathrm{~m}^{-1}\right) \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0$ , and $\mathrm{E}_{\mathrm{z}}=0$ . In what direction is this wave moving?

Correct Answer
verified

Household wiring can emit electromagnetic waves of frequency $60 \mathrm{~Hz}$ . What is the wavelength of these waves?

Correct Answer
verified

Using the approximate formula for the Doppler shift, $\mathrm{f}_{\mathrm{o}} \approx \mathrm{f}_{\mathrm{S}}\left(1+\mathrm{v}_{\mathrm{rel}} / \mathrm{c}\right)$ one finds that a source is moving away at $0.60 \mathrm{c}$ . What result would the exact formula yield for the recession speed?

Correct Answer
verified

Correct Answer
verified

What is the wave number for a wavelength of $600 \mathrm{~nm}$ ?

Correct Answer
verified
D

What is the speed of light in a material that has an index of refraction of 2.0?

Correct Answer
verified

The Sun is $1.50 \times 10^{8} \mathrm{~km}$ from the Earth. How long does it take for light to reach us from the Sun?

Correct Answer
verified
A

If the intensity of radiation from the Sun is $1.4 \mathrm{~kW} / \mathrm{m}^{2}$ at a distance of $150 \times 10^{6} \mathrm{~km}$ , at what distance is the intensity $5.6 \mathrm{~kW} / \mathrm{m}^{2}$ ?

Correct Answer
verified

At the summer solstice in June, at what latitude is the Sun directly overhead at solar noon?

Correct Answer
verified

In vacuum, the components of an $\mathrm{EM}$ wave are $\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m}) \cos \left[\left(5.00 \mathrm{~m}^{-1}\right) \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0$ , and $\mathrm{E}_{\mathrm{Z}}=0$ . What is the wavelength of the wave?

Correct Answer
verified

If unpolarized light with $\mathrm{E}_{\mathrm{rms}}=20 \mathrm{~V} / \mathrm{m}$ is passed through a polarizer, what is the transmitted $\mathrm{E}_{\mathrm{rms}}$ ?

Correct Answer
verified

What iindex of refraction halves the wavelength that light has in a vacuum?

Correct Answer
verified

In vacuum, the components of an $\mathrm{EM}$ wave are $\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m}) \cos \left[\left(5.00 \mathrm{~m}^{-1}\right) \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0$ , and $\mathrm{E}_{\mathrm{z}}=0$ . What is $\omega$ ?

Correct Answer
verified

Correct Answer
verified

Exam 22: Electromagnetic Waves

What is a light-year in SI units?

Correct AnswerverifiedE

If a 20 W20 \mathrm{~W}20 W laser beam, which has an initial diameter of 2.0 mm2.0 \mathrm{~mm}2.0 mm , spreads out to a diameter of 2.0 m2.0 \mathrm{~m}2.0 m after traveling 10,000 m10,000 \mathrm{~m}10,000 m , what is the final intensity of the beam?

Correct AnswerverifiedShow Answer

ε0μ0=\varepsilon_{0} \mu_{0}=ε0​μ0​= ?

Correct AnswerverifiedShow Answer

Which of the following is the direction of an electromagnetic wave having electric and magnetic field vectors E\mathbf{E}E and B\mathbf{B}B ?

Correct AnswerverifiedShow Answer

How fast would you have to drive in order to see a red light as green? Assume λ=630 nm\lambda=630 \mathrm{~nm}λ=630 nm for red and λ=\lambda=λ= 530 nm530 \mathrm{~nm}530 nm for green.

Correct AnswerverifiedShow Answer

A 20 W20 \mathrm{~W}20 W laser beam, with an initial diameter of 2.0 mm2.0 \mathrm{~mm}2.0 mm , spreads out to a diameter of 2.0 m2.0 \mathrm{~m}2.0 m after traveling 10,000 m10,000 \mathrm{~m}10,000 m . What is the initial intensity of the beam?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Household wiring can emit electromagnetic waves of frequency 60 Hz60 \mathrm{~Hz}60 Hz . What is the wavelength of these waves?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the wave number for a wavelength of 600 nm600 \mathrm{~nm}600 nm ?

Correct AnswerverifiedD

What is the speed of light in a material that has an index of refraction of 2.0?

Correct AnswerverifiedShow Answer

The Sun is 1.50×108 km1.50 \times 10^{8} \mathrm{~km}1.50×108 km from the Earth. How long does it take for light to reach us from the Sun?

Correct AnswerverifiedA

If the intensity of radiation from the Sun is 1.4 kW/m21.4 \mathrm{~kW} / \mathrm{m}^{2}1.4 kW/m2 at a distance of 150×106 km150 \times 10^{6} \mathrm{~km}150×106 km , at what distance is the intensity 5.6 kW/m25.6 \mathrm{~kW} / \mathrm{m}^{2}5.6 kW/m2 ?

Correct AnswerverifiedShow Answer

At the summer solstice in June, at what latitude is the Sun directly overhead at solar noon?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If unpolarized light with Erms=20 V/m\mathrm{E}_{\mathrm{rms}}=20 \mathrm{~V} / \mathrm{m}Erms​=20 V/m is passed through a polarizer, what is the transmitted Erms\mathrm{E}_{\mathrm{rms}}Erms​ ?

Correct AnswerverifiedShow Answer

What iindex of refraction halves the wavelength that light has in a vacuum?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified
E

If a $20 \mathrm{~W}$ laser beam, which has an initial diameter of $2.0 \mathrm{~mm}$ , spreads out to a diameter of $2.0 \mathrm{~m}$ after traveling $10,000 \mathrm{~m}$ , what is the final intensity of the beam?

Correct Answer
verified

$\varepsilon_{0} \mu_{0}=$ ?

Correct Answer
verified

Which of the following is the direction of an electromagnetic wave having electric and magnetic field vectors $\mathbf{E}$ and $\mathbf{B}$ ?

Correct Answer
verified

How fast would you have to drive in order to see a red light as green? Assume $\lambda=630 \mathrm{~nm}$ for red and $\lambda=$ $530 \mathrm{~nm}$ for green.

Correct Answer
verified

A $20 \mathrm{~W}$ laser beam, with an initial diameter of $2.0 \mathrm{~mm}$ , spreads out to a diameter of $2.0 \mathrm{~m}$ after traveling $10,000 \mathrm{~m}$ . What is the initial intensity of the beam?

Correct Answer
verified

Correct Answer
verified

Household wiring can emit electromagnetic waves of frequency $60 \mathrm{~Hz}$ . What is the wavelength of these waves?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the wave number for a wavelength of $600 \mathrm{~nm}$ ?

Correct Answer
verified
D

Correct Answer
verified

The Sun is $1.50 \times 10^{8} \mathrm{~km}$ from the Earth. How long does it take for light to reach us from the Sun?

Correct Answer
verified
A

If the intensity of radiation from the Sun is $1.4 \mathrm{~kW} / \mathrm{m}^{2}$ at a distance of $150 \times 10^{6} \mathrm{~km}$ , at what distance is the intensity $5.6 \mathrm{~kW} / \mathrm{m}^{2}$ ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

If unpolarized light with $\mathrm{E}_{\mathrm{rms}}=20 \mathrm{~V} / \mathrm{m}$ is passed through a polarizer, what is the transmitted $\mathrm{E}_{\mathrm{rms}}$ ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified