Why don’t buildings block radio waves as completely as they do visible light?
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Why don’t buildings block radio waves as completely as they do visible light?
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- On its highest power setting, a certain microwave oven projects 0.75 kW of microwaves onto a 20 by 35 cm area. (a) What is the intensity in W/m2? W m² (b) Calculate the peak electric field strength Eo in these waves. V m (c) What is the peak magnetic field strength Bo? T Submit QuestionHow is the potential energy associated with an electromagnetic wave shared between the electric and magnetic fields? O there is no potential energy associated with an electromagnetic wave more of the energy is in the electric field it is equally shared between them O more of the energy is in the magnetic field4. A spotlight shines onto a square target of area 0.35 m?. If the average rms strength of the magnetic field in the EM waves of the spotlight is 1.2 x 107 T, calculate the energy transferred to the target if it remains in the light for 12 minutes. (Give answer in joules) F3 FB #3 2$ 4 & * 2 3 5 8 9 W E T U K
- Which of the following lists correctly shows the regions of the electromagnetic spectrum in order of increasing frequency? a Radio waves, infrared, microwaves, visible, ultraviolet, X-rays, gamma rays b Radio waves, infrared, microwaves, visible, ultraviolet, gamma rays, X-rays c Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays d Radio waves, infrared, microwaves, ultraviolet, visible, X-rays, gamma rays#3: A certain 60.0 Hz AC power line radiates an electromagnetic wave having a maximum electric field strength of 13.0 kV/m. A) what is the wavelength of this very low frequency EM wave? B) What is its maximum magnetic field strength?