A microwave source produces pulses of 20.0–GHz
Figure P34.60
(a)
The wavelength of microwaves.
Answer to Problem 34.60AP
The wavelength of microwaves is
Explanation of Solution
Given Info: The frequency of pulse is
Formula to calculate the wavelength is,
Here,
Substitute
Conclusion:
Therefore, the wavelength of microwaves is
(b)
The total energy contained in each pulse.
Answer to Problem 34.60AP
The total energy contained in each pulse is
Explanation of Solution
Given Info: The frequency of pulse is
Formula to calculate the total energy is,
Here,
Substitute
Conclusion:
Therefore, the total energy contained in each pulse is
(c)
The average energy density inside each pulse.
Answer to Problem 34.60AP
The average energy density inside each pulse is
Explanation of Solution
Given Info: The frequency of pulse is
Formula to calculate the average energy density for each pulse is,
Here,
Substitute
Conclusion:
Therefore, the average energy density inside each pulse is
(d)
The amplitude of electric and magnetic fields in the microwaves.
Answer to Problem 34.60AP
The amplitude of electric field is
Explanation of Solution
Given Info: The frequency of pulse is
Formula to calculate the magnitude of electric field is,
Here,
Substitute
Formula to calculate the magnitude of magnetic field is,
Here,
Substitute for
Conclusion:
Therefore, the amplitude of electric field is
(e)
The force exerted on the surface on each pulse.
Answer to Problem 34.60AP
The force exerted on the surface on each pulse is
Explanation of Solution
Given Info: The frequency of pulse is
Formula to calculate the force exerted is,
Here,
Substitute
Conclusion:
Therefore, the force exerted on the surface on each pulse is
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