Which of the following statements about electromagnetic radiation is true?It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both.The oscillating electric and magnetic fields are completely out of phase with one another.It consists of oscillating electric and magnetic fields that are parallel to one another and perpendicular to the direction of propagation.It always travels at 3 ×× 10 88 m/sm/s .
Question
Which of the following statements about electromagnetic radiation is true?It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both.The oscillating electric and magnetic fields are completely out of phase with one another.It consists of oscillating electric and magnetic fields that are parallel to one another and perpendicular to the direction of propagation.It always travels at 3 ×× 10 88 m/sm/s .
Solution
The correct statement about electromagnetic radiation is: "It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both."
Here's why:
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Electromagnetic radiation is composed of electric and magnetic fields that oscillate perpendicular to each other. This means that if the electric field oscillates vertically, the magnetic field oscillates horizontally, and vice versa.
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The direction of propagation (the direction in which the wave travels) is perpendicular to both the electric and magnetic fields. This is a fundamental characteristic of all electromagnetic waves, from radio waves to gamma rays.
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The electric and magnetic fields in an electromagnetic wave are not out of phase with each other - they are in phase. This means that they reach their maximum and minimum values at the same time.
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Electromagnetic waves do not consist of electric and magnetic fields that are parallel to each other. As mentioned above, the fields are perpendicular to each other.
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The speed of light in a vacuum is approximately 3 x 10^8 meters per second, not 3 x 10^88 m/s. This speed is the maximum speed at which all electromagnetic waves, including light, can travel.
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Given below are two statements :Statement I : Electromagnetic waves are not deflected by electric and magnetic field.Statement II : The amplitude of electric field and the magnetic field in electromagnetic waves are related to each other as E0=μ0ε0−−√B0.In the light of the above statements, choose the correct answer from the options given below:Statement I is true but statement II is falseBoth Statement I and Statement II are trueStatement I is false but statement II is trueBoth Statement I and Statement II are false
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