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Light is @ Macmillan Learning O an oscillating electric field alone. electric and magnetic fields that oscillate parallel to each other. O electric and magnetic fields that oscillate perpendicularly to each other. O electric and magnetic fields that oscillate in a random direction relative to each other. O an oscillating magnetic field alone. Incorrect Which of the statements concerning light are true? Its propagation direction is perpendicular to both the electric field and the magnetic field. The speed of light in matter is greater than the speed of light in a vacuum. It moves at a constant speed through a vacuum. The speed of light is the same no matter what material it is traveling through. The speed of light in matter is less than the speed of light in a vacuum. Its propagation direction is parallel to both the electric field and the magnetic field. IncorrectThe figure shows a snapshot of an electromagnetic wave traveling out of the screen in a straight line earning through empty space. The vertical arrow represents the electric field vector at that instant, and the horizontal arrow represents the magnetic field vector. At the time of this snapshot, the magnitudes of the electric and magnetic fields are at their respective maximum values for this particular wave. Which of the diagrams represent possible configurations of the electric and magnetic fields for this wave at some point in the future? Classify the images accordingly, assuming that the wave continues to travel out of the screen unimpeded. Possible Not possible Answer BankA normal human heart, beating about once per second, creates a maximum 4.00 m V potential across 0.400 m of a person's chest, producing a 1.00 Hz electromagnetic wave. What is the maximum electric field strength E produced? Macmillan Learning E = V/m What is the corresponding maximum magnetic field strength B in the electromagnetic wave? B = T What is the wavelength 1 of the electromagnetic wave? 1 = m Question Credit: OpenStax College PhysicsSuppose the maximum safe average intensity of microwaves for human exposure is taken to be 1.00 W/m . If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away, min, must you be to be exposed to an average intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with @ Macmillan Learning no complications from absorption or reflection. I'min = m What is the maximum electric field strength Eo at this distance? The permittivity of free space is co = 8.854 x 10-12 C2/ (N-m?) . The speed of light is c = 3.00 x 10% m/s. Eo = V/m Note: Early radar units leaked more than modern ones do. This caused identifiable health problems, such as cataracts, for people who worked near them. Question Credit: OpenStax College PhysicsA traveling electromagnetic wave in a vacuum has an electric field amplitude of 70.7 V/m. Calculate the intensity S of this wave. Then, determine the amount of energy U that flows through area of 0.0277 mover an interval of 16.1 s, assuming that the area is perpendicular to the direction of wave propagation. @ Macmillan Learning S = W/m2 U =@ Macmillan Learning Complete the statements relating to the electromagnetic spectrum. g waves have the lowest frequencies- waves have the shortest wavelengths. waves have frequencies between 7.5 x 10H Hz and 3.0 X 1016 Hz. 3 waves have wavelengths between about 3 mm and 3 In. waves can be used to image bones in the human body. waves are often used in nightvision applications. i waves can be seen with the naked eye. GammarayI-I Radio II Ultraviolet II X 4a).r II Infrared II Visible II Microw mreI-I E Macmillan Learning Find the frequency f in terahertz of visible light with a wavelength of 667 nm in vacuum. What is the wavelength .1. in centimeters of elcclromagnelic microwave radiation whose frequency is 9.25 (31-12? a.\" | | an The antenna for an AM radio station is a T3.5mhigh tower whose height is equal to onequarter the wavelength of the broadcast signal. At what frequency f does the station transmit? r=|:|Hz E Macmillan Learnin