(a)
The direction in which the wave is travelling.
(a)
Answer to Problem 67PQ
The direction in which the wave is travelling is
Explanation of Solution
Write the expression for magnetic field of
Here,
Compare equation (I) with given equation of magnetic field.
Conclusion:
Therefore, the direction in which the wave is travelling is
(b)
The wave number, wave-length and frequency of the electro-magnetic wave.
(b)
Answer to Problem 67PQ
The wave number is
Explanation of Solution
Write the expression for wave-length of the electro-magnetic wave.
Here,
Write the expression for frequency of radiation.
Here,
Conclusion:
Compare equation (I) with given equation of magnetic field.
The wave number is
Substitute
Substitute
Therefore, the wave number is
(c)
The expression for electric field of electromagnetic wave
(c)
Answer to Problem 67PQ
The expression for electric field of electromagnetic wave is given below.
Explanation of Solution
Write the expression for maximum value of electric field of
Write the expression for electric field of electromagnetic wave.
Write the expression for angular frequency.
Conclusion:
Substitute
Substitute
Substitute
Therefore, the expression for electric field of electromagnetic wave is given below.
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Chapter 34 Solutions
Physics for Scientists and Engineers: Foundations and Connections
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